The entire Instagram hooha has everyone recommending other camera apps that either I’ve forgotten or not heard of. I do say that some of them can improve their design to be more sticky and Instagram certainly has a good formula. Hmm.
Flickr – good at Flickr integration, and background uploading. even has filters.
Hipster – interesting postcard style
Pixlr-o-matic – powerful filters. more than instagram
Instagram – good ppl network. familiar interface
Streamzoo – has own network.
Click through on the Google Play Store links to download.