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Re:Ask HN: What do you think of Objective-C? by bd on Thursday December 18, 2008 @04:44AM (#401986)
A long time I ago I used to make multi-agent artificial life simulations in a system called Swarm, which was in Objective C:

http://www.swarm.org/wiki/Main_Page

I don't remember much, just that it was a nice language, well fitting for the problem domain. It seems meanwhile they also added Java and C++ support.

Re:Ask HN: What do you think of Objective-C? by metachor on Thursday December 18, 2008 @03:16PM (#402582)
I too used to program in the Swarm platform with Objective-C.

Off-topic, but if you are interested in frameworks like this, also check out the MASON Multiagent Simulation Toolkit (which is based in Java):

http://www.cs.gmu.edu/~eclab/projects/mason/