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Here are some links that will be helpful in constructing this list:. These are only potential candidates for inclusion -- some might not be appropriate due to their actual version compatibility with Fedora.
Software listed on the "Tools" page in the wiki
https://fedora-commons.org/confluence/display/DEV/Fedora+Tools
Software listed under "Fedora User Interface Projects" on the wiki
http://fedora-commons.org/confluence/display/DEV/Fedora+User+Interface+Projects
Hydra: (in development)
http://fedora-commons.org/confluence/display/hydra/The+Hydra+Project
FESL: (in development)
http://www.fedora-commons.org/confluence/display/DEV/Improved+Fedora+Security+Layer
funAPI:
http://funapi.sourceforge.net/
Fedora/djatoka integration:
http://sourceforge.net/apps/mediawiki/djatoka/index.php?title=Fedora_Integration
VTLS VITAL:
http://www.vtls.com/products/vital
Stuff findable via Google:
fedora irods
activefedora
python-fedoracommons
python-fedoracommons-webarchive
django-fedora
(other creative google searches?)
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