Open Source Project Management Software Posted 2004-07-29; filed under OpenSource. Open Workbench is an OSS version of Project Workbench and calls itself "the open source alternative to Microsoft Project". I look forward to testing this out. Related Postsbeyond a binary societyCommons coming along Leave a Reply Click here to cancel reply. Name (required) Mail (required) (will not be published) Website Δ Notify me when new comments are added.