Anca is an H.323 client for Qt 3.x. It allows communication (voice/video) with other similar clients over the Internet, e.g. Gnomemeeting. Its design is minimalist and clean, and has support for embedded devices. It is very modular, and has the following plugins: addressbook (LDAP support), video-in (v4l support), video-out (framebuffer support for embedded devices), and DTMF tones.
Portos Commander is a powerful and intuitive file manager patterned after old-school managers like Midnight Commander and Norton Commander. It features basically all your file-management needs, quick document viewing according to file type, browsing tar archives, integration of FTP, Samba, secure shell, and other clients, file selection using wildcards or regular expressions, file searching using various criteria, directory bookmarking, automatic file status updating (via FAM), displaying the free space on the current partition, and drag'n'drop.
A lightweight library containing a number of classes and functions to ease the task of programming GTK+ programs with C++ in POSIX environments.