If a pesky ex-girlfriend keeps calling you or a salesperson refuses to take you off of their call list, it's too bad for you if you have a regular iPhone because it doesn't support call blocking. However, the jailbroken iPhone does, with iBlacklist. The app is a call blocker that lets users personalize what numbers they want to ignore entirely, what numbers they want to send directly to voicemail and what numbers will receive a busy signal. You can also send an AutoReply in the form of a text message. The app keeps a history of every action as well.