Thirty codes were added to the ASCL in May, 2026:

Alsvid: Algorithms for visualization and image data reduction with Julia and Python
ASTA: Automated Satellite Tracking for Astronomy
CGISim: Roman Space Telescope coronagraph (CGI) diffraction model/simulator
CKS-Cool: California-Kepler Survey-Cool
corosims: Roman Coronagraph observation simulator

CosmoBLENDER: Extragalactic foreground biases in CMB lensing analyses
DeepStreaks: Identifying near-Earth asteroids
DIPLODOCUS: Distribution In PLateaux methODOlogy for the CompUtation of transport equationS
DIVE: Delaunay trIangulation Void findEr
EMCCDD: EMCCD Detect

ETSI: Exoplanet Transmission Spectroscopy Imager data reduction pipeline
geko: Grism Emission-line Kinematics tOol
JADE: Joining Atmosphere and Dynamics for Exoplanets
kastredux: Specialized Lick/KAST optical spectral reduction package
keplerspline: Computing normalization splines for Kepler light curves

lognorm: Xspec model for a log-normal temperature distribution
MSG: Multidimensional Spectral Grids
Nemesis: Multi-physics, multi-scale simulations with a focus on dynamics
PHECT: Pulsar Halo Emission Computation Tool
phrosty: PHotometry for ROman with SFFT for tYpe Ia supernovae

pydive: Delaunay-based cosmic void finder in Python
RPP: Roman Telescope CGI diffraction modeler
s-BART: Semi-Bayesian template matching for precise Radial Velocities
Sage: Machine-learning search pipeline for compact binary coalescence gravitational-wave signals
SEDust: SED fitting of AGB stars with DUSTY

SIMBA: Solver for Inferring Molecular aBundances in Astrophysical environments
ulptkit: Unified Lagrangian Perturbation Theory Toolkit
VegasAfterglow: High-performance framework for gamma-ray burst afterglows
VIPCALs: VLBI Pipeline for automated data Calibration using AIPS
WI2easy: High-precision analysis of warm inflation dynamics

Twenty-five codes were added to the ASCL in April, 2026:

AdvancedHMC.jl: Hamiltonian Monte Carlo algorithms
AstroLink: Find astrophysically-relevant clusters from point-cloud data
CLAPP: AI pair programmer for the CLASS cosmology code
CUBE2: Optimized cosmological N-body simulation code
DeepFMKit: Simulation and analysis toolkit for Deep Frequency Modulation Interferometry

DiscEvolution: Model the evolution of dust and gas in protoplanetary discs
dvsg: Kinematic disturbance parameter ΔV⋆−g calculator
fastparquet: Python implementation of the Parquet columnar format
gdpyc: Galactic hydrogen column density and extinction estimator
GWBird: Gravitational Wave Background Inventory of Response functions for Detectors

ISSI: Isochrone splitting for symplectic integrators
iterrec: Iterative reconstruction of linear BAO and initial conditions
karate: Knowing AsymmetRic Atmosphere of Transiting Exoplanets
linmix: Python port of LINMIX_ERR IDL package
mcdust: Parallel simulation code for dust evolution in protoplanetary disks

MESA-QUEST: MESA Quasi-star Evolutionary Simulation Toolkit
PNGolin: Binned power, bi-, and trispectrum estimators for cosmological density fields
PyOperators: Operators and solvers for high-performance computing
PySimulators: Instrument acquisition modeling and inversion tools
PyWavelets: Discrete and continuous wavelet transforms

SIMPL: Solar Imaging Pipeline for LOFAR
skewspec: Skew spectra of galaxy surveys
SPAN: Cross-platform GUI software for optical and near-infrared spectral analysis
t-cup: Robust linear regression
tilepy: Tool for observation scheduling in poorly localized events

Twenty-two codes were added to the ASCL in March 2026:

AstroQ: Optimization-based scheduler for astronomical observations
BAHAMAS: Bayesian inference of stochastic gravitational-wave backgrounds
BaSIL: Bayesian Spectral-cube Inference and Learning
easyspec: Streamlining long-slit spectroscopy
exoatlas: Tools for compiling and plotting populations of transiting exoplanets

GalaxyGenius: Synthetic galaxy image generation from hydrodynamical simulations
GpuFitsCrypt: High-performance FITS encryption library
growpacity: Computationally efficient dust opacity model suitable for coagulation models
Haskap_Pie: Dark matter halo finder and merger-tree generator for cosmological simulations
InflationEasy: Lattice simulations of single-field inflation

MASSKIP: Multi-Amplifier Sensing Skipper CCD Pipeline
NeuralPDR: Neural-ODE emulator of 3D-PDR photodissociation regions
PyMGal: Optical mock observations from hydrodynamical simulations
raccoon: Cleaning low-frequency sinusoidal artifacts in JWST-NIRSpec IFS data
RapidGBM: Quick-look analysis of Fermi/GBM data

SECRET: Machine-learning density estimation for cosmic-ray electron spectra
Simframe: Framework for scientific simulations
SpiralMap: Milky Way spiral arm models and visualization tools
Stellarium: Planetarium for your computer
Synthesizer: Synthetic astronomical observables generator

THOR: Linking survey detections to recover heliocentric orbits of Solar System objects
TriPoDPy: Dust coagulation and evolution in protoplanetary disks

Twenty-five codes were added to the ASCL in February 2026:

ACE: Atmospheric Chemical Equilibrium
ARVE: Extreme precision radial velocity analysis
braai: Bogus/Real astrophysical event classification for the Zwicky Transient Facility (ZTF)
Chempath: Pathway analysis for chemical reaction networks
ConTEST: Nonparametric consistency test between observations and astrophysical models

EMPEROR: Exoplanet MCMC Parallel tEmpering Radial velOcity fitteR
ensemble: Interactive inhomogeneous ensemble photometry
ethraid: Characterize long-period companions with partial orbits
ExoReL: Modeling and retrieving exoplanet reflected-light and thermal-emission spectra
fftvis: Non-uniform fast Fourier Transform-based visibility simulator

FINKER: Nonparametric kernel regression for frequency estimation
gallifrey: Bayesian time series structure learning with Gaussian processes
HCIPy: High Contrast Imaging for Python
HZ_evolution: Modeling the habitable histories of exoplanets
JuliaStellarDynamics: Robust and accurate libraries for stellar dynamics

MatBYIB: Bayesian parameter estimation for eccentric inspiral binaries
Neloura: Web-based astronomical image analysis and visualization platform
PACT: Planetary Atmosphere Chemistry and Temperature
pht-ml: Identify long period exoplanets from TESS light curves using deep learning
PyStarshade: High-contrast exoplanet imaging simulations with starshades

PyTICS: Telescope Intercalibration using Comparison Stars
RedNoiseFALs: Red noise-based false alarm thresholds
socca: Source Characterization using a Composable Analysis
Spartan: Modeling advection-dominated accretion flows and their spectra
Tails: Identify and localize comets in image data

Eighteen codes were added to the ASCL in January 2026:

ATAT: Astronomical Transformer for time series And Tabular data
BBPN: Noise reduction tool for JWST calibrated images
BRAINS: BLR Reverberation-mapping Analysis In AGNs with Nested Sampling
Cesam2k20: One-dimensional stellar structure and evolution modeling
ctool: Continuum tool
Duffell_Gap: 1D model for planet-induced gaps in protoplanetary disks

gSeaGen: High-statistics neutrino and atmospheric muon event generation for neutrino telescopes
LibRA: Radio astronomy algorithms for interferometric imaging
LIGHT: Bayesian galaxy field reconstruction for dark siren cosmology
MeerFish: Fisher forecasting for 21 cm intensity mapping surveys
MOCPy: Create and manipulate Multi-Order Coverage maps
penquins: Python client for Kowalski

Photodynamics.jl: Differentiable transit light curves
PyCatIndex: Flexible pipeline for measuring Calcium II Triplet line strengths
RECON: Power spectra and time-series reconstruction for AGNs
skysurvey: Transient simulator
Sparkling: Spherical cosmic voids finder
Voro++: Voronoi tessellation computation

Twenty codes were added to the ASCL in December, 2025:

ACor: Automated Correlation and processing for radio interferometry
FGOC: Focal-Geometry and Curvature classifier
H21F: Gaussian Process based 21-cm foreground separation code
iSTARMOD: Chromospheric activity in cool stars
Karabo: Validation and benchmarking radio telescopes and algorithms

megaradrp: Data reduction pipeline for MEGARA
numina: Data reduction pipeline interface
PANCAKE: Color–magnitude diagram fitting for stellar populations
PAOS: Physical optics propagation and system modeling
polarpy: POLAR gamma-ray polarimetry data processing

PST: Stellar population synthesis in galaxies
PyLongslit: Astronomical long-slit spectra processor
RVSNUpy: Spectroscopic redshift measurement by cross-correlation
SolarZip: Error-bounded compression of solar EUV images
STARDIS: LTE radiative transfer for synthetic stellar spectra

synax: All sky Synchrotron emission simulation with JAX
tilsotua: WCS reconstruction for LRIS multislit masks
TOAExtractor: Calculate TOAs and residuals of X-ray pulsars
xmm_simulator: XMM mock data simulator
ztfquery: Programmatic access to ZTF data products

Thirty codes were added to the ASCL in November, 2025:

Aperture: High-performance particle-in-cell framework for plasma simulations
BNS_NURATES: Neutrino-Matter interaction rates for binary neutron star mergers
CASSL: Conventional and Sub-Conventional Strong Lensing forecasts and simulations
CompactObject: Bayesian EOS inference for neutron stars
deepCR: Deep-learning based cosmic ray removal for astronomical images

frb_covariance: Fast radio burst covariance
GalClean: Remove bright sources from a FITS image
GAMA Quasar Hosts: Star formation analysis pipeline
HERACLES++: Multidimensional compressible hydrodynamics solver
HyperGal: Supernovae extraction and classification

kdcount: KDTree for low dimensional spatial indexing
lenscov: Full CMB and lensing covariances
Limbdark.jl: Analytical transit light curves for limb darkened stars
MicroLIA: MicroLensing Identification Algorithm
ml4ptp: Machine learning for PT profiles of exoplanet atmospheres

nirwals: Data-reduction and monitoring pipeline for SALT NIRWALS
PIXON: Reverberation mapping analysis in active galactic nuclei
pulses: Periodic spectral modulation analysis
PyCALI: Intercalibrate light curves
pyDIA: Star detection, difference imaging, and photometry

pyhdust: Analysis tools for multi-technique astronomical data and hdust models
redmonster: Automated redshift measurement and spectral classification
SFR_ChebyFit_example: Chebyshev-based correction of SFR estimators
Shamrock: Multi-GPU hydrodynamics framework for astrophysics
skaro: Unveiling planet demographics in the Milky Way

spinosaurus: Lagrangian perturbation theory for galaxy shape and density correlations
Starkiller: Removing stars and satellites from IFU data
STDWeb: Simple Transient Detection for the Web
vis-r: Fast radial profile modeling for radio interferometric data
ViSL3D: Interactive 3D Visualization of Spectral‑Line Datacubes

Twenty-six codes were added to the ASCL in October, 2025:

BoGEMMS-HPC: Large-scale simulations for X-ray and Gamma-ray observations
CMDFitter: Fit a probabilistic generative model to a color-magnitude diagram
CorrCal: Calibration code for semi-redundant arrays
DISCO-DJ: Differentiable Simulations for Cosmology, Done with JAX

FitPDF: Bayesian distribution fitting for pulsar and FRB data
GraFIT: Frequency response function identification in Gravitational Wave detectors
GrayHawk: Gray-body factor calculations for black holes
Lux: Generative latent-variable modeling of astronomical data

MadVoro: Massively distributed construction of Voronoi diagrams
MARFA: Broad-spectrum high-resolution atmospheric absorption analyzer
NP_TMC: Nano-particle Transition Matrix Code
pPXF-SEW: Full-spectrum fitting with penalized pixel-fitting and equivalent width extraction

pyEFPE: Waveform model for inspiralling precessing-eccentric compact binaries
pyproffit: Analyze X-ray brightness profiles from clusters of galaxies
RotCurveTool: Streamlined framework for simulating and fitting galactic rotation curves
RUN Pipeline: Strong lens classification and detection of small Einstein radius systems

SIROCCO: Simulating Ionization and Radiation in Outflows Created by Compact Objects
SNITCH: Bayesian inference of star formation histories
SourceDetect: CNN-based event search for TESS data
spike: All-in-one tool to generate and correctly drizzle HST, JWST, and Roman PSFs

SpyDust: Improved implementation of SPDust for modeling spinning dust radiation
Streaktools: Simulation, measurement, and fitting of satellite-generated streaks
Synthpop: Modular Galactic population synthesis
TABASCAL: Modeling and subtraction of moving radio-frequency interference in interferometric data

TripleLens: Calculating light curves for triple microlensing systems
TRIPP: TRansient Image Processing Pipeline

Twenty-four codes were added to the ASCL in September, 2025:

ArchNEMESIS: Python version of the NEMESIS radiative transfer and retrieval tool
CODES: Benchmarking surrogates for coupled ODE systems
Dazzle: Detecting and characterizing transient phenomena in crowded fields
DeepExtractor: Deep learning time-domain reconstruction for Gravitational Wave power excesses
FindPOTATOs: Candidate detection set tracklet assembler

GRTresna: Solving the initial data constraints in numerical relativity
MANTA-Ray: Optical properties of fractal aggregates estimator
microlux: Binary lensing light curve calculator
moons-sim: 1D Spectral Simulator for VLT-MOONS
nazgul: GRB triangulation via non-stationary time-series models

NutMaat: Stellar spectra classifier based on MKCLASS
PAPI: PANIC Pipeline
PolyCLEAN: Radio interferometric imaging based on Polyatomic Frank-Wolfe
pyCARPool: Convergence Acceleration by Regression and Pooling
PyEMILI: Spectral line identification tool

pyLDT-cosmo: Matter PDF predictions in Large Deviation Theory
PySCo: Cosmological N-body code with modified gravity theories
pySELFI: Python implmentation of the Simulator Expansion for Likelihood-Free Inference algorithm
Simbelmynë: Hierarchical probabilistic simulator for generating synthetic galaxy survey data
SOAP: Spherical Overdensity and Aperture Processor

STELA: Sampling Time for Even Lightcurve Analysis Toolkit
VacuumTunneling: Evaluating bubble profile with a renomalization factor
volcano: Mapping exoplanet surfaces from one-dimensional time-series data
wolensing: Lensed gravitational waves simulator

Twenty-two codes were added to the ASCL in August, 2025:

ABC-SN: Spectroscopic supernova classifier
AGNI: Model for extreme atmospheres on rocky exoplanets
AstroWISP: Astronomical Widefield Images Stellar Photometry
AutoWISP: High-precision photometry pipeline
DeepSSM: Cosmological emulator for the GW spectrum from the modified sound-shell model

EllipSect: Analysis tool for GALFIT output
FiCUS: FItting the stellar Continuum of Uv Spectra
fm4ar: Inferring atmospheric properties of exoplanets using flow matching posterior estimation
FRion: Time averaged correction of Faraday Rotation from the IONosphere
gwsnr: Gravitational Wave Signal-to-Noise Ratio computation

HipFT: High-performance Flux Transport
IAR_Model: Autoregressive model to irregularly spaced data
MPI-Rockstar: Hybrid MPI and OpenMP parallel implementation of Rockstar
OFT: Open-source Flux Transport
pyPLUTO: Tool for analyzing PLUTO code outputs

pySTARBURST99: Python port of STARBURST99
RheoVolution: Rheology evolution in the time domain
SIGWAY: Compute second-order, scalar induced gravitational wave signals
sMV: Serial MultiView phase plane estimation
SoFT: Solar Feature Tracking suite

tropygal: Entropy estimates for galactic dynamics
Twinkle: GPU-based high-efficiency binary-lens microlensing