The Astrophysics Source Code Library (ASCL) is a free online registry for source codes of interest to astronomers and astrophysicists and lists codes that have been used in research that has appeared in, or been submitted to, peer-reviewed publications. The ASCL is citable by using the unique ascl ID assigned to each code. The ascl ID can be used to link to the code entry by prefacing the number with ascl.net (i.e., ascl.net/1201.001).
ASCL is covered by Thomson Reuters Data Citation Index. ASCL is covered by SCOPUS database linking. The ASCL is a free online curated registry of source codes used to produce research results in astrophysics and astronomy. It is a growing resource, with new additions every month. Submissions by code authors are vetted by ASCL editors. It is indexed by the SAO/NASA Astrophysics Data System (ADS) and has been cited in over 30 publications, including journals, proceedings, and theses (http://ascl.net/wordpress/?p=1485).