DotNetMQ is a message broker (message queue, message oriented middleware) that has several features including guaranteed delivering, routing, load balancing, server graphs... so on. See article on CodeProject.com for more information: http://www.code
FireIRC is an IRC Client that brings the ideas of mIRC, X-Chat, and Linkinus all into one client. With FireIRC you get lots of extendability for whatever needs you need on IRC.
eQSL Firefox add-on automatic downloader for Hamradio
ww.eQsl.cc gives a great service for ham radio. With this service you can exchange QSL with other ham radio and when you want, you could access to the web portal and see you eQsl. However a missing point is that you can't download all the eQsl on your local pc at the same time. If you want to download all eQsl, you have to select each eQsl and download it... and waste many time. With this add-on, you can download all your eQSLs in one shot!