dvtm brings the concept of tiling window management, popularized by X11-window managers like dwm, to the console. As a console window manager, it tries to make it easy to work with multiple console based programs like vim, mutt, cmus, or irssi. dvtm is intended to be used where X11 isn't available or over SSH. In conjunction with dtach, it can be seen as a lightweight alternative to GNU screen.
The xattr command lists, writes (sets), prints (displays), and deletes the extended attributes of file system objects. An extended attribute is a name:data (key:value) pairing arbitrarily associated with a file system object (e.g. file, directory, or symbolic link). The name of an extended attribute may be any null-terminated UTF-8 string. The data associated with it may be either textual or binary. This implementation of the xattr command is designed to be backwards-compatible with the Python script that shipped as /usr/bin/xattr in Mac OS 10.5.0 (Leopard).
Variance provides a general-purpose, custom-wirable junction box for conversion between Java types. Values stored as Variants can be converted freely to any type (provided that a type converter exists between the original type and the target type), and users can add new type converters or override existing conversions.
Gow (GNU On Windows) is a lightweight alternative to Cygwin. It uses a convenient Windows installer that installs about 130 extremely useful open source Unix applications compiled as native Win32 binaries. It is designed to be as small as possible, about 10 MB, as opposed to Cygwin which can run well over 100 MB depending upon options.