Article and Preprint Databases
Physics Research Guide
Data and Software Archives & Catalogs
This is a pretty comprehensive list of software for professionals.
Maintained by the Institute for Astronomy Library
at the University of Hawaii.
Astronomical Software & Documentation Service (ASDS)
Gives information on dozens of software packages, outlining their
capabilities, requirements, and availability. One can also find
a document collection of user guides, programmer guides, and on-line
Librarian Contact Information