Some were mentioned before, but...
BM Vex (G10, solid lockup, like the slight recurve)
BM Monochrome (all steel construction, solid framelock, like the spearpoint)
Spyderco Centofante series (light, thin, but solid--VG10 is awesome!)
Spyderco Native at Wallie world (easy to find, no S&H needed, cool spearpoint, S30V!!)
Boker Trance (Solid framelock, thin and small but easy carry/useful)
Boker Subcom (tiny framelock but so cool..., makes a good "second knife"...)