I just tried Oxios and it didn't do any better than the others.
Robb
I've experienced this same thing Robb. It get's very frustrating not being able to free up more than single digit ram(i too tried all the mem management progs, they didn't help).
That's seems to be common to most window mobile devices. Gwes.exe, device.exe and other will continue to get larger with continued use until you perform a soft-reset.