Adblock Plus - AdBlock Plus is a browser extension for Firefox, Chrome, Opera, and several other popular browsers that prevents intrusive ads like pop-ups and malicious code from appearing on websites you visit.

Squid Proxy - Website Content Acceleration and Distribution. Thousands of web-sites around the Internet use Squid to drastically increase their content delivery. Squid can reduce your server load and improve delivery speeds to clients.

BlockParty - Real-time voice chat rooms from the creators of turntable.fm

CCProxy - Want to share Internet connection? Get every computer online through a single Internet connection?

Twitter One Click Block - Add a block button for a simple one click blocking.

3proxy - 3proxy freeware proxy server for Windows and Unix. HTTP, SOCKS, FTP, POP3