Ex-Crawler is divided into 3 subprojects (Crawler Daemon, distributed gui Client, (web) search engine) which together provide a flexible and powerful search engine supporting distributed computing. More informations: http://ex-crawler.sourceforge.net
"Netlands Project" is a <b>Graphical MUD engine</b>, it comes with a distributed world server, an advanced IA server, a Macromedia Flash MX client and a predefined world named WOARPS, full of ready to go adventures.