I was looking through Google Play last night for a different type of client one that I could post to Twitter and FaceBook and maybe Tumblr easily. I found Scope then with further looking I found that The Verge did I whole write up on it. Sooo rather than duplicate what someone already did pretty well I am just going to point you over to The Verge review of Scope. I really like it Supports FaceBook, Instagram (viewing and commenting not posting), Tumblr and of course my favorite of all Twitter. Below is a link to the article or a direct link to Google Play to try it out for yourself.
The Verge Article Link
Google Play Direct Link