I've used Code Mine, Mere Mortals, Visual Extend Visual FoxExpress, ProMatrix, and Visual MaxFrame. All have the pluses - but overall I liked MaxFrame the best. Since Drew Speedie is no longer with it I don't know how well it's being suported anymore though.
The one that I didn't like so much was ProMatrix - that one (at least for me) I found rather a pain to do anything if you needed to "step out of the box"...too me it was more of a RAD tools than a framework - so I can see why a lot of people would like it.

>I'm trying to see which of the VFP frameworks are the most popular. I found this list on fox.wikis.com, and I'm wondering if everyone will comment as to which ones are the most widely used. Some have their own category here on UT, but the activity seems low for the most part. Perhaps most the UT community that is active here does not even use a commercial framework, but rather has simply built their own over time, like I have.
>
>CodeBook
>Code Mine
>Com CodeBook
>Fair Frame
>Mere Mortals
>Visual Extend
>Visual FoxExpress
>Visual FoxPro's own Fox Foundation Classes
>Visual Maxframe Professional
>Visual Pro Matrix
>West Wind Web Connection
>
>(list from http://fox.wikis.com/wc.dll?Wiki~VisualFoxProFrameWorks~VFP )