I thought it was TechTool, but it's TattleTech that gives the most comprehensive report. It's not exactly shareware, though it's a free trial and they expect(ed?) registration and payment if you're (were?) going to use it for business purposes, unlimited use a/o upgraded feature levels. The agreement and registration info is in the freely distributable download's folder after decompression. Since the link below is for OS7-9.2.2, I'm not sure what they expect any longer.

Info links, etc. https://www.google.com/#newwindow=1&q=tattletech+macintosh

I've been using 2.8.1, but this works for 2.8.4 which I haven't tried, but plan to: http://www.tucows.com/preview/207028

From my post in The Links Project it looks like The Gauge Series is freeware. Newer has a free download of Gauge Pro, which I also have never tried, but it doesn't appear to include SlotInfo. I used SlotInfo for the screenshots in the IIfx' "Full House" series of posts because it gives just enough info clearly in a snappy graphical presentation. TattleTech give you the full story in .TXT, and nothing but the .TXT [] ]'>

edit: Apparently TattleTech freeware now! Check this review, bonus points if anyone can tell me what the awesome KBD in the header pic is called?

http://systemfolder.wordpress.com/2009/02/14/tattletech/