DragonFly BSD 2.8.2 x86_64 Vmware appliance
Description from Wikipedia:
DragonFly BSD is a free Unix-like operating system created as a fork of FreeBSD 4.8. Matthew Dillon, an Amiga developer in the late 1980s and early 1990s and a FreeBSD developer between 1994 and 2003, began work on DragonFly BSD in June 2003 and announced it on the FreeBSD mailing lists on July 16, 2003.
- 512MB of free RAM
- 64bit processor (Intel, AMD)
Download Vmware image of DragonFly BSD 2.8.2 x86_64 and try out without installation !