Catalogs and Indices for Finding (Scientific) Software – Daniel S. Katz's blog

"I’ve been thinking about software catalogs for a while, mostly since the program I lead at NSF (Software Infrastructure for Sustained Innovation, SI2, see the second half of http://nsf.gov/si2) has funded a fairly large number of projects, around 100.  Many of these projects are producing and supporting a piece of software, but some contribute to multiple pieces of software, and in some cases, multiple projects contribute to the same piece of software.  In addition, some of the projects were funded long enough ago that they have ended or will end soon."