Serial Backer is a Crowdfunding App which helps you keep track of your pledges. The App sends out push notes when backed projects are nearing their end, so you can help them give the final push by sharing on Facebook or Twitter. It will also send out a push note, when a reward is due. This will allow you to check the campaign page, and see if there are any delays. The Statistics page gives an overview of your pledges so far.
When backing Serial Backer you'll get the App for free, and recieve a share in the revenue. Rewards start form $5.