• SuckRSS
  aggregates and consolidates all your various social networking activity and blogs
• GeoRSScoder
  receives georeferenced objects by email (e.g. from a mobile phone), merges all the content and add it to a map as soon as it is received using relevant Eexif and iptc data. Uses Google maps api and Geonames (for reverse geocoding).
• Statr for Flickr
  tracks page views statistics for your Flickr photo stream using the Flickr API (currently more than 25.000 users use this really basic service for free)
• Geoupdater
  can access location data from your Fire Eagle account and automatically push status updates to various social sites (e.g.Facebook,...). Uses the FireEagle and Facebook APIs.

below are some of my past (pre-00s) personal projects; I removed any links since I no longer have time to develop and support them.

• IceNEWS
  an intelligent agent software that regularly visits news and media sites and gathers links to the latest stories related to particular topics as they're published
• LiveCam
  a high performance video streamer for live video broadcasting over web. Server side software was written in C, client side written in Java
• Coolboard
  a multi-user conferencing software with chat and shared whiteboard services. Client-server architecture, written in Java