a multi-purpose application level gateway, or a proxy server which runs on multiple platforms (Unix, Windows, MacOS X and OS/2). DeleGate mediates communication of various protocols (HTTP, FTP, NNTP, SMTP, POP, Telnet, SOCKS, etc.)
ajaxWM is a window manager in a web browser, a terminal emulator and an SSH proxy. It allows remote controlling a computer even when there is a firewall and packet analyzer between, blocking everything else than HTTP(S)-connections. Because the ajaxWM client runs in any javascript-capable web browser, you can even use it when you are not allowed to install any software, for example in an internet café, at school, or at work.