Sigproc
Original Version
Sigproc is a pulsar search software package originally developed by Duncan Lorimer. You can find his version of the code at:
http://sigproc.sourceforge.net/
HTRU version
A fork of the project, for the HTRU pulsar survey, is available from Michael Keith's github page:
https://github.com/SixByNine/sigproc
The HTRU version contains new, more efficient, dedispersion code (Matthew Bailes), single pulse searches (Sarah Burke) and myriad additional fixes and adjustments (Michael Keith).