Is there any app for Stack Exchange?
Is there an android app for StackExchange sites and if not is there one in development?
I know of 3, there may be more: I found these on stackapps.
None of these apps really allow you to "login" and you can't ask or answer questions. This is probably a limitation of the StackExchange API. It also doesn't allow you to vote (since you are not logged in).