word processing

VirtualDub is a video capture and processing utility licensed under the GNU GPL.

Batch file rename and other kinds of processing; photo and music files support.

Raw Therapee is a free RAW converter and digital photo processing software.

Any distributed processing application with a interface to distribute job slices

Hanso Tagger is a complex tag processing software for audio files.

A batch processing front end for HCenc, DGpulldown, & Aften.

Any distributed processing application with a interface to distribute job slices

Pixels a fast graphics viewer with advanced image processing.

Audio monitoring, a parametric equalizer based on analog signal processing

AudioLab is a set of .NET 2.0 components for fast audio capture and processing.