YaCy - A caching HTTP/HTTPS proxy. Pages that pass through the proxy are indexed and can be searched using a built-in HTTP server. [Open Source, GPL] RabbIT - Speeds up surfing over slow links by removing unnecessary parts (like background images) while still showing the page mostly like it is. Removes advertisements, compresses text, and images. [Open Source, BSD-like] PServer - Java internet proxy server and surveillance monitor written in 100% pure JAVA language. Handles HTTP, HTTPS, SMTP/POP3, FTP, SOCKSv5, TELNET. Also can detected and filtered out annoying Javascript PopUp windows, advertisements and promotions. ProProxy - Generic TCP/IP proxy. Handles UDP as well as TCP. [Open Source, GPL] Java Anonymous Proxy - JAP - Acts as a local proxy between the browser and the insecure Internet. All web pages requested by the browser go directly to JAP, and are multiply encrypted there. The encrypted messages travel through a chain of servers (named Mixes by the inventor of the theoretical background, David Chaum) to the final destination on the Internet. [Freeware] Net anonymity service back-doored - SecurityFocus reports the Java Anonymous Proxy (JAP), used to anonymise access to the Internet, has been back-doored by court order. Smart Cache - Proxying, filtering cache server. Speeds up surfing and can block ad banners. Also has privacy features such as selective cookie filtering, changing HTTP referrer and browser name. [Open Source, GPL] Development has been suspended due to security issues. JAP unbackdoored - SecurityFocus BugTraq mailing list reports that the court order against the partners of the project has been suspended and the back-dooring functions in JAP were disabled. Sloppy - A deliberately slow proxy to simulate the dial-up modem experience. [Open Source, GPL] MailBridge - A HTTP tunnel for POP and SMTP to allow access from behind a firewall and acts as a local POP and SMTP server. It uses SWT for the GUI. [Free software, MIT] ZeeProxy - A HTTP proxy that serves web sites stored inside archives, decompressing files on-the-fly, as needed.