The long card in your picture of various RAM module is an Apple PC Compatibilty card - essentially a standalone Pentium PC on a PCI card that usually came in P100 or P166 variants.

http://homepage.mac.com/olivers/DOScard/DOScard.html

Some of the smaller cards are PDS ethernet cards, the larger one with a Phillips chip some sort of PowerMac PDS video card.

Nice finds!

JB