Sponsored tweet's - has got be at the top, As this is one of the most recognized.

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 Depending on how many follower's you have the more your tweet's will be worth,

 as with any of these program's. 

Revtwt - Get the tweet's that need to be tweeted sent to your rss feed program. 

Then copy the tweet's and paste it in your Twitter account. 

Make's it more easy to use. Or you do it the normal way.

TWTMOB

  Get paid for tweet's.

Twtbuck - nothing less than Google Adsense for Social Media service called Twtbuck?

Zuvvu - Earn for tweet's, Facebook comment's Referring

other's, Join today for free.