softtitledonwloadlinkhomepagecontactlicenceSoftware Title: Cecid
Download Link: http://sourceforge.net/projects/cecid/
Homepage: http://sourceforge.net/projects/cecid/
Contact Them: Ticket System on their project page.
License: Open Source Project, Free to use (Project looks dead)

CECID is a PHP script designed to anonymize and cloak HTTP requests on restrictive connections.
CECID is run on a remote, unrestricted server, and accesses pages for users, editing the page’s source
in realtime to evade content filtering software.

looks like a dead project, no updates since 2004 but the files are still on project homepage.