Not a VST - but a really useful little free virtual midi keyboard - that is really handy when setting up/testing racks or when writing scripts.
I have been using it for about 7 years and it has never given me any aggravation. I use it all the time when I am writing scripts and the like when away from real keyboards (mainly because I have an affinity for comfortable chairs when doing this sort of stuff!).
I hope its of use to someone.