Little UNIX, an UNIX version for Commodore 64. The new version is called Lunix the Next generation, or LNG.
Some features include (list from the home page):
- Preemptive multitasking (up to 32 tasks, 7 priorities)
- 30 standard applications available
- Native C128 version available
- (simple) command shell (with history function)
- Support for CBM (IEC bus) devices (e.g. 1541) and RS-232 interfaces
- Open source, comes with all needed (cross-) development tools
- LNG can be terminal and terminal server (RS232)
- TCP/IP stack, support for SLIP and PPP
- telnet and ftp client
Home page: http://lng.sourceforge.net/