If you are willing to look for discontinued tools there are a few more worth looking at (depending on how extensive a collection you are planning and what functionality you require):
Leatherman Mini tool (might be too bulky though)
Sebertool M3, M4
Bear & son Mini Bear jaws
Buck Newt
Gerber Ricardo corkscrew MT
Gerber keychain tool (slide-out tools)
Gerber Solstice
KutMaster MiniMaster
Kershaw TwoCan
Scrade ST2 Tough Chip
Stanley Auto-plier
Swiss Tech (several different mini MTs)
Buck Tool Mini Buck (but IMO the folding mechanism is a bit flimsy & the pliers are tiny)
babola: "Enjoy your tools and don't be afraid to air your opinion and feelings here, but do it in courteous and respectable way toward others, of course."