I use Zeam for a launcher... it's minimal, lacking some features, but doesn't eat up my battery life at all. I'd just avoid using heavy themes with a ton of launcher specific (read: Calendar) widgets. Now... a question for you all. I've been on the hunt to replace Penultimate and Readdle (both iPad) for my Android tablet. I just need a good eBook reader that doesn't mind the larger PDF's that I throw at it, and can catalog/list my eBooks. And I'd love a pen/note taking tool. I've tried: Extensive Notes, FreeNote, Handrite, MaplePaint (ok, I like this one for different reasons). SyncSpace has come the closest, but it's not... there yet.