quickly and easily change video resolutions in X

gvidm

quickly and easily change video resolutions in X

Running gvidm will pop up a list of available modes and allows the user to select one if desired. This makes it perfect for running from an application menu or a hotkey, so you don't have to use ram for an applet constantly running. If you are running dual or multi-head displays, it will give you a list of screens so you can select the appropriate one.
I/O performance measurement and load generation tool

spew

I/O performance measurement and load generation tool

Spew is used to measure I/O performance of character devices, block devices, and regular files. It can also be used to generate high I/O loads to stress systems while verifying data integrity.
Audio file denoiser

gwc

Audio file denoiser

The Gtk Wave Cleaner (gwc) is an application that helps you in getting rid of noise and clicks in audio files. This is most commonly used when translating your old vinyl or old tapes to a digital format, but it can be applied to every soundfile that has a more or less constant noise level.
GNOME front-end for wget

gwget

GNOME front-end for wget

GUVCView with 30fps webcam

guvcview

GTK+ base UVC Viewer

guvcview is a simple GTK+ interface for capturing and viewing video from devices supported by the Linux UVC driver.
the xine video player, GTK+/Gnome user interface

gxine

the xine video player, GTK+/Gnome user interface

This is a GTK+ based GUI for the libxine video player library. It provides gxine, a media player that can play all the audio/video formats that libxine supports. Currently, this includes MPEG1/2, some AVI and Quicktime files, some network streaming methods and disc based media (VCD, SVCD, DVD). A more complete list can be found on http://xinehq.de/.