I tried most of the other clients, but Osfoora is currently the best. You can do almost all Twitter-related tasks without leaving the app. Inline images, streaming support, Instapaper support, mute function and TweetMarkers are great features, it's a good companion app to TweetBot on iOS.
Here are two ideas to make this app even better:
- it should be possible to drag an image to the compose window in addition to the file picker
- a mute function for keywords and Twitter clients would be a great addition