iZotope RX? is the most complete audio restoration product on the market, a unique standalone application designed from the ground up to combat a range of audio problems.

In addition to unique workflow features designed to help you get the best results, RX's powerful tools can do processing that plug-in based restoration products simply cannot do. This paired with completely new processing technology results in cleaner, more natural sounding noise reduction and audio repair. RX is ideal for audio restoration and archiving, recording and Mastering, broadcasting and podcasting, video production, forensics, and any application that demands spotless results and a truly complete range of restoration tools.
RX Tools
* Hum Removal: Cleans up electrical hum and line noise.
* Declipper: Rebuilds clipped audio from overloaded A/D converters and analog gear.
* Declicker: Eliminates clicks, *****les, pops and digital impulse noises

http://www.izotope.com/products/audio/rx/