YesPaste! is a pastebin application written with Ruby On Rails. It allows you to add a comment to the paste, and allows user comments. Comments can be formatted with BBCode syntax (with [code][/code] possibilities). CodeRay is used for code highlighting. It also permit paste editing.
Flynax General Classified script allows you to run your own classifieds portal. The Administration Panel will allow you to create simple or complex sites. You can build general classifieds as well as classifieds for specific categories (plants, guns, sporting goods, etc.). Form builders, categories, listings fields, plans, and other managers will help you adapt the software to your needs.
Karma is a Web service provider for tracking "karma" points of users who are distributed across several separate Web applications. It is useful for when sites want to allow community contributions to content, but certain higher types of content should only be able to be submitted by people who have demonstrated the ability to contribute value at lower levels. The vision is to create a generic karma service where a central server instance provides its services to several related Web applications. Those applications are the clients of the karma server instance. They can quickly and securely submit and retrieve karma for their users.