The ones I use the most are

Gpodder
grr
Sociality
instinctiv
Tickstill
ConnectNow
Scout
Gom
Petrovich

Not sure which of those are worth considering, for example, I'm sure that ConnectNow is a no-go because people have said there are no widgets on the screen of this new device.

Hope they're mistaken - I love my FB, weather, calendarHome and Conversations widgets.