1. ssh For those of you who don't know, `man ssh_config` -- you can set per-host and per-network connections in your `~/.ssh/config` file. Perfect when you ha

1. ssh For those of you who don't know, `man ssh_config` -- you can set per-host and per-network connections in your `~/.ssh/config` file. Perfect when you have different usernames on some hosts, alternate ports, etc. 2. git 'Nuff said here. Never going back to SVN. 3. nkf Pretty specific, but a really useful tool if you need to deal with Japanese character sets -- converts pretty much any encoding to any other encoding. 4. VMWare Fusion / VMWare Workstation If you're going to push code out to a server running on a different OS than your workstation, having a local, virtualized copy of that OS is indispensable. 5. pbcopy and pbpaste Move text between the shell and clipboard on OS X. xcopy under Linux has the same functionality.