Awesome Legacy Code

A curated list of legacy systems with publicly available source code

Contents

• Languages
  • Assembly
  • C
  • Java
  • C#

Languages

Assembly

• Apollo-11 guidance computer
• PDP-10 Incompatible Timesharing System
• Prince of Persia - Apple II version
• MS-DOS - Versions 1.X and 2.0
• Commodore Source Code (BASIC, DOS and KERNEL)

C

• NCSA Mosaic
• Mozilla (the open sourced version of Netscape Navigator)

Java

• Tennis
• Bad Fruit from Peel & Slice ( practice )
• Guilded Rose (practice)
• ChartSmart ( practice )
• triva (practice)
• Apache-Solr (real)

CSharp

• Guilded Rose (practice)
• Roslyn - C# compilation service
• .NET Foundational Libraries
• .NET runtime (BCL, JIT compiler, GC)