Uninstalling apps not from the marketplace

Hi -

I installed some apps hosted on mediafire (Gallery3D, Voice Search, etc). I was following links from a well known page recommending tips and improvements to an HTC Desire.

How do you uninstall stuff like that? Normally you have to go via the market, but in this case I can't.

Having read the thread on unsafe apps, I'm worried I've got these things from an untrusted source.

What can I do if I want to get them off my phone?

Thanks

 

Thanks guys for the info. Yes, I have Astro. Still slightly concerned about whether it would really remove everything a malicious app might add to your phone.