WattmanGTK is described as 'Linux (GTK3+) GUI to view detailed information about and configure AMD GPUs settings' and is an app in the System & Hardware category. There are more than 10 alternatives to WattmanGTK for Linux, Windows, Android, iPhone and Mono. The best alternative is Open Hardware Monitor, which is both free and Open Source. Other great apps like WattmanGTK are MSI Afterburner (Free), CoreCtrl (Free, Open Source), EVGA PrecisionX 16 (Free) and Dmidecode (Free, Open Source).
A powerful overclocking tool for your graphics card, which also includes screen capture and video capture tools, plus overlays. Has a lower FPS hit than Fraps, and offers the same functionality. The beta versions include audio streams alongside the video capture.
CoreCtrl is a Free and Open Source GNU/Linux application that allows you to control with ease your computer hardware using application profiles. It aims to be flexible, comfortable and accessible to regular users.
DRIconf is a configuration applet for the Direct Rendering Infrastructure. It allows customizing performance and visual quality settings of OpenGL drivers on a per-driver, per-screen and/or per-application level.