FREE / OPEN SOURCE OPTIONS (not expiring demos)
WikiPedia has a helpful comparative matrix of project management solution options, and includes 7 open source choices which appear to meet our requirements:
Some of the options currently listed on the WikiPedia matrix (like Project.net) are being run by companies and given away free, but commercial support plans for enterprise users. I left those off my shortlist above. I also did not include options like OpenProj, GanttProject andOpen Workbench, because they are strictly desktop-client programs and not server/web based. Some of the options listed on WikiPedia, like eGroupWare, falsely indicate they are open source when they are NOT and are strictly commercial.