I think part of the problem is the strange way that the Market works and the ordering of the results. If you seach for "flashcards" then you get StudyDroid and Ankidroid as the first 2 results, then a bunch of "baby" flashcard programs by SAGEMILK and TEACHERSPARADISE. Some of the best programs do not appear until much further down in the results - and some do not show up at all (like JetMemo).
It takes quite a bit of searching to find some of these apps - which I am sure hinders their download rate.
It takes quite a bit of searching to find some of these apps - which I am sure hinders their download rate.