Open Conference Systems (OCS) is a free Web publishing tool that will create a complete Web presence for your scholarly conference. OCS will allow you to:

• create a conference Web site
• compose and send a call for papers
• electronically accept paper and abstract submissions
• allow paper submitters to edit their work
• post conference proceedings and papers in a searchable format
• post, if you wish, the original data sets
• register participants
• integrate post-conference online discussions

OCS version 2.1.1 is now available. New features include:

• manage conferences that occur more than once (e.g. yearly)
• an expanded, multiple-round review system
• e-mail template system
• localization & translation tools
• credit card payment for registrations
• automated "thanks-for-submitting" messages
• accept login/password for participants
• Creative Commons licensing of presentations
• more customizable, scalable and secure code
• Session Scheduler
• Multiple languages
• Help files
• Documentation
• ...and much more.