I've been using Vasara for a while now and I can say it's the best visual texturing system around. Anyone texturing maps should use this plugin, and should be able to master it's abilities pretty quickly thanks to the simplistic interface.
Vasara is a Lua script and dedicated HUD for use in texturing maps in Aleph One. The HUD provides more explanation for new users compared to Visual Mode, and features a mouse-driven interface for choosing textures and options.