FASTA compares pairs of protein or DNA sequences as well as comparing a single protein or DNA sequence to a database or library. FASTA completes searches very quickly and can be run locally as well as on a server.

The FASTA search page also supports comparisons of DNA sequences to protein sequences, and protein sequences to DNA sequences. There are several other useful tools indexed on the site.

Download: 

The most recent version of the FASTA package can be found on the FASTA web site.

Documentation: 
Instructions for All: 

FASTA can be run locally, or through the web. To run the serial version of FASTA, at the command prompt type:

fasta35To run the parallel version type:

fasta35_t