| [https://github.com/TomHarte/CLK/releases]
|
| Aug 2May 15, 20202023
| [[CPC old generation|CPC range]], [[Acorn Electron]], [[Apple II]], [[Oric 1/Atmos]], [[VIC-20]], [[ZX80/81]], [[Atari 2600]], [[Atari ST]], [[Macintosh]], [[MSX|MSX 1]], [[ColecoVision]]
| Donationware & Open source