dfc displays file system space usage using graphs and colors. In some ways, it is a modernized version of df as it is able to use colors, draw graphs and export its output to different formats such as CSV or HTML.

The Object Exchange protocol can best be described as binary HTTP. OBEX is optimised for ad-hoc wireless links and can be used to exchange all kind of objects like files, pictures, calendar entries (vCal) and business cards (vCard).

There's nothing in the program that makes it *require* WindowMaker, except maybe the look. It's extremely customizable, provides great control, and runs on a 64x64 window. You can get it too look almost like anything, provided of course you READ the documentation.

The 1-Wire bus is a cheap low-speed bus for devices like weather sensors, access control, etc. It can be attached to your system via serial, USB, I2C, and other interfaces.

Fcitx5 is the next generation of fcitx input method framework. It provides pleasant and modern input experience with intuitive graphical configuration tools. The framework is highly extensible with support for GTK+ and Qt toolkits, D-Bus interfaces, a large variety of desktop environments and a developer-friendly API.