Delicas are good. I just prefer the spyderco's with the jimped forward finger choil on the underside. I do a lot of fine detailed work though, so I use it a lot, and the "choke up" is ultra-comfortable. Therefore I am going to recommend the Dragonfly as a little knife 2.25" Make sure to buy from a respected seller as there are a ton of fake dragonfly's out there. They also make it in the yellow "salt" version which has the impressive H1 100% stainless steel.
Some other ideas:
-Spyderco Cat (G10, 440C, 2.44", only $50!)
-Cold Steel mini lawman (The strongest "little" knife I own. Triad Lock is great)
-Ontario Rat 2 (you can get a Rat 1 and Rat 2 for about $60 total and they are awesome)
-SOG Flash 1 (ultra light assisted opening. East to close as well, but there is resistance against the blade).
:Last Note:
If one hand deployment is important to you, I find that I do best with a "tip up" carry in the pocket. For me, my thumb is right there when I grab it. As a result, I will mostly only buy a folder that has a tip up option.