Tartarus
Ambassador
TapaTalk also offers a dark theme.It seems smoother and you also have the option of multi-quoting on Tapatalk. If you don't want notifications, which is good for me since you will stop taking the lead as frequently, use the iMore Forums app.
TapaTalk also offers a dark theme.
http://img.tapatalk.com/d/14/05/10/6utyha5a.jpg
Sent from from my iPhone 5