MojoMojo is a Web2.0 wiki with AJAX live preview, hierarchical structure, tags, diffs, pluggable syntax, permissions/ACL, attachments, RSS feeds, a photo gallery, edit conflict resolution via 3-way merge, themes/skinning, localization, built-in full-text search, and a reverse index. Since it's built on top of the Perl Catalyst Web framework, MojoMojo supports any Web server, and includes its own standalone one. It also support any database backend supported by the DBIx::Class ORM, and has been successfully tested with PostgreSQL, SQLite, and MySQL.
ZOC is a popular terminal emulator and telnet client that supports telnet, modem, SSH 1 and 2, ISDN, serial, TAPI, Rlogin and other means of communication. Its terminal emulator supports Xterm emulation with full colors, meta-keys, mouse support, and local printing; VT102, VT220, and several types of ANSI; and Wyse, TVI, TN3270, and Sun's CDE. Unique features include full keyboard remapping, REXX scripting, and support for connecting to named pipes.
How can you live without NDN?
NDN is the first program I start after I boot my machine, and the last I shut down. Using NDN, I am more efficient managing files than anyone could ever be using Explorer. Same goes for the command line: take your best Unix guru and have them compile/build/test/release/update files job using the command line - they won't be able to beat a regular user of a file manager such as NDN.
If you find yourself typing "cd; ls; cp; mv; cat" etc. - get NDN. Your productivity boost will be beyond "significant".