I have been using (and abusing) Ridgid's Jobmax tools for years. I like the changeable heads, and they came out with a spiral cutter last year, too. I have the 12V version, but there are corded, and 18V ones available. It keeps lots of different light-duty tools in a small space on the boat. Combines a lot of stuff.

What I really like about Ridgid's stuff is that it has a lifetime guarantee - no questions asked, even on batteries! I took two 5 year old drill batteries in because they weren't holding a charge anymore - they just gave me two new ones! A bit of a pain to find out where to go, to get the service, but it is GREAT.