PicaSto is a system for decentralized picture storage and sharing on the internet with separation of content and presentation. It uses the RDF metadata model to make the metadata available independently of the actual pictures.
Volley is a client/server system similar to Hotline, but using a plugin design that makes it more extensible. Server plugins define services such as chat and file sharing. Client plugins allow users to interact with each other using those services.
BlastServ is a plugin used with XChat and Mac OS X. It will be an IRC File Server (FServ or FServe), similar to SysReset for Windows or Obsidian. Fservs send files over DCC, and have an interface like FTP. They are a quick and easy way to transfer files.