Listed below are some software resources for
Digital Asset Management

iView MediaPro (My favorite DAM software for Photographers, also available at a discount here)
MetaSync (an iView Utility that enablles synchronization between catalogs)
Extensis Portfolio 8 (an improvement on 7, but still missing key features, IMO)
MediaDex (used to be Cumulus Single User. Also missing key features, IMO)
idImager (A Windows only program with a good feature set)
iMatch (another Windows only program with good features)
DAMuseful. My small software venture with Tom Nolan. RapidFixer and Rank & File scripts to Pimp Your Bridge. Look for cool new stuff soon.

More stuff soon.

DIgital Asset Management
Organizing Photographs