ekpar2 (Easy Par2 for KDE) is a tool to create par2 recovery sets for one or more source files, verify and repair these source files. It has an easy to use gui for KDE (aimed to look and feel like the windows tool QuickPar).
Par2 (or Parchive) is a set of recovery files that holds error correction information for one or more source files using the Reed Solomon algorithm (see parchive on SourceForge).