Pins
Skewers
Paraphrased from table of contents from Reinfeld's 1001 sac and combo book:
Pin, fork, double attack, discovered attack, overloading, removing defender, clearance sac, interference sac, queen sac, skewer, and zugzwang.
Great! Now to get some pictures up!! Don't have time yet, but would love to do it. Others of you feel free to post visuals if you have time. This would be a cool compilation.
What is a "sac and combo" book?
http://chesstempo.com/tactical-motifs.html
It has most of the ones in post #4 above. But it appears it may have a few more.
Can we generate a list of all known chess tactics (visuals would be even better!) for the purposes of personal study? For example:
+Fork
+Double Attack
...What else?