Rage3D have the lastest tweaking tool by Humus (of Raid On Tweaker fame). He programmed a new tweaker. It is called UniTuner, and besides tweaking the Radeon, it also tweaks *any* consumer video card on the market today.

So hit the Read More button for more info and to download. UniTuner inital release.

Main features:

Supports all graphics cards and Windows 98/ME/2000/XP.
Special tweaks available for Radeon series cards, GeForce series cards and Voodoo 5.
Flexible and extensible design.
Plugin support. (Developer pack included.) Many cool standard plugins included:
RegEdit - An powerful integrated registry editor.
Radeon overclocking.
Gamma correction.
OpenGL info - Presents OpenGL info, including links to OpenGL extension documentation.

Refreshrates - Allows you to set your own refreshrates for each resolution.

Customizable GUI. Set your own background image, text color etc.
Categorisation of tweaks.
UI for adding/removing/editing tweaks and categories.
Export/import tweaks
Dynamic registry path lookup engine. (Developer pack included.)
Backup of registry categories. Easy to restore.
Automatical backup of new categories.
Cool animations :) (Developer pack included.) And more ...

Download UniTuner 1.0 here.