Obvious one, but good for newbies....

SPB Pocket Plus and Resco File Explorer are both awesome programs. Both have plugins that can reside on the Today screen.

both are EXTREME memory hogs tho, especially if you run both at the same time. unless you need to run the today screen plugins, i recommend you disable them in the Settings>Today>Items screen.

Even with my device overclocked, it is still a noticable slowdown. With neither plugin on there, the device zips along on the today screen.