http://hamsterrepublic.com/ohrrpgce/...Main_Page.html
OHRRPGCE is a free software RPG engine which has an easy-to-use creating tool. There are also many playable games available at their web site.
Download:
http://hamsterrepublic.com/ohrrpgce/...Downloads.html
Games:
http://hamsterrepublic.com/ohrrpgce/...ory_Games.html