Another site where it is possible to find many PostgreSQL-related projects is PGXN. PGXN is more recent than pgFoundry and it is possible to find recent extensions there.
The PostgreSQL Extension Network (PGXN) is a central distribution system for open source PostgreSQL extension libraries. It consists of four basic parts:
- PGXN Manager: An upload and distribution infrastructure for extension developers
- PGXN API: A centralized index and API of distribution metadata
- PGXN Search: This site is for searching extensions and perusing their documentation
- PGXN Client: A command-line client for downloading, testing, and installing extensions
The difference between pgFoundry and PGXN is that pgFoundry is about project management and PGXN is about distribution and exposure.