I’ve used the Crunch Dude Free guitar effect vst plugin, with reaper on my small cheap as chips budget laptop studio and it works quite well.
It’s got a nice boost and if played with gives some quite nice results.
Check it out…
The Heeb CrunchDude 0.1 is a very simple, yet effective guitar amplifier emulation VST plug-in. As the name implies, its strength lies not only in clean or over-the-top lead sounds, but especially in the excellent crunch sounds it can produce (certainly a weak point in many similar devices, virtual or otherwise). Its use is not limited to the electric guitar however. It can also be extremely useful in processing e.g. bass guitar, synthesizers, etc. Let your imagination run wild, and let your ears be the judge!