Filetype testing:
FITS -- a nice combination of the major file identification tools
http://code.google.com/p/fits/
Comparison of DROID, JHOVE, NLNZ
http://www.artefactual.com/wiki/index.php?title=DROID,_JHOVE,_NLNZ_Metadata_Extractor
PRONOM Registry:
http://www.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=new
DROID:
http://sourceforge.net/apps/mediawiki/droid/index.php?title=User_guide:_File_format_identification
Archivemata -- a useful sample architecture
http://archivematica.org/wiki/index.php?title=Software
Virus:
http://code.google.com/p/clamavj/
clamAV testing
images
ImageJ -- java native image editor and converter; easier to install and manage than ImageMagik
http://rsb.info.nih.gov/ij/
ImageMagick or GraphicsMagick (a fork)
http://www.imagemagick.org/script/index.php
http://www.graphicsmagick.org
Documents
Java tools for DOCX format
http://openxmldeveloper.org/archive/category/1008.aspx
POI Tools for Word (.doc) format
http://poi.apache.org/hwpf/index.html
OpenOffice Tools for converting documents:
unoconv -- format conversion
http://dag.wieers.com/home-made/unoconv/
http://dancrintea.ro/html-to-pdf/
http://www.theserverside.com/discussions/thread.tss?thread_id=37995
Canadian Guidelines for format support
http://www.collectionscanada.gc.ca/government/products-services/007002-3017-e.html
US Guide:
http://www.digitalpreservation.gov/
http://www.fcla.edu/digitalArchive/pdfs/DigitalArchivePolicyGuide.pdf