Volunteer Management Software?
ewilts asks: "I've been actively looking for volunteer management software but am consistently coming up empty. The vast majority (by far) is Windows desktop based and typically layered on top of a Windows database engine like Access or FileMaker. I'm specifically after something web-based (Linux/Apache) since there is no centralized volunteer office and the volunteers have systems including Windows 95, Macintosh, Linux, and everything in between. So far, eBase seems to be best solution, being open-source but it's Windows-centric, not web-centric. Any pointers to low-cost or free software to help manage a couple of hundred volunteers would be greatly appreciated."
Since my only knowledge of "Volunteer Management Systems" is what I just read on your eBase link, I won't make any guarantees, but it's possible that TUTOS will be reasonable match. It's a fairly generic CRM system, and while its terminology may not be an exact match for what your people use, it can do most of the stuff that eBase claims. The only thing that I noticed specific about eBase was it's Evaluate the cost-effectiveness of campaigns as you move donors and volunteers up the "ladder of engagement"; if that's simply marketing speak for "match donations to the mailout that provoked them", I suspect a little wrangling with the TUTOS projects, installations, and invoices could provide a similar report. Try asking more specifically about your needs on the TUTOS mailling list.
Of course, TUTOS is just one of the many OS CRM systems, maybe another would be better starting point. Trying googling for "Linux CRM" rather than "Volunteer Management".