If there is a freeware vst gate and/or wah on inserts on any of my audio channels, those definitely are Green Gate and Green Wah, developed (my guess is in SynthEdit) by
Wurr Audio Engineering. The Green PreXpression merges these two but goes a little further: an incoming volume swell pedal has been added (responds to MIDI CC#7), an output pan knob for more routing possibilities, a wah pedal of course (responds to MIDI CC#11), and the wah module fx mix knob. Watch the pedals in action as you step on your MIDI foot controller! You do have one, don't you? If necessary, you can always disengage the wah module. Download
Green PreXpression (5,2 MB).
Ladies and Gentlemen! Mesdames et Messieurs! May I present my personal favorite of freeware amp sims in a long time: SoloC - masterfully written by LePou, and obviously based on Soldano. By the way, LePou is the guy who wrote that superb tutorial at guitarampmodeling.com about skinning the GUIless plugins using Synthedit, and whose instructions your servant Requietus has been patiently and hopefully creatively following :-) Visit LePou's blog for the latest version of SoloC and I also encourage you to donate him if you find the plugin useful. 
However, you can get an old version of SoloC 1.02 here (640 KB).