I have a GI issue Camillus folding pocket knife (all stainless one, a lot like the old Boy Scout pocket knife) that I carry everywhere with me. I have a Becker Campanion (Pre-Kabar) as well as a Kabar Kukri machete that stay with my BOB, along with a SOG multi tool.
http://www.imsplus.com/index.php?tar...oduct_id=30053
http://www.knifecenter.com/kc_new/st...SUBMIT2=Search
http://www.knifecenter.com/kc_new/st....html?s=KA1249
http://www.knifecenter.com/kc_new/st....html?s=SOG60N
I also have a SOG Desert Dagger that I'll throw my bag sometimes. They don't make those anymore, but the Daggert is close.
http://www.knifecenter.com/kc_new/st...html?s=SOG26DB
ETA - I picked up one of the new production Gerber Mk II's at the Tanner recently, cheap. I'm not sure yet if I like it better than my Desert Dagger, but I've always wanted one and I sure wasn't going to pay $200+ for any of the ones I've seen for sale lately.