First of all, if you've already searched for an answer and someone still moans at you for asking a question, then they're the idiot, not you. Asking questions when you can't find the answer is perfectly reasonable, that's what these forums exist for.

Secondly, on the software front, I assume you've explored all there is to see on maemo.org/downloads? That's the best place to find tablet software which works properly, but I've a feeling you want to explore beyond it.

I don't do this myself but from what I understand you can install apps as .deb files as long as you have the required dependencies installed to make them work. Repositories make this far far easier because it's all automated, but you did ask for stuff outside them... :-)