Open Source Library Experiences

[I asked this on the SWEng-GameDev list, but I want this list's opinion, 
too]

Hey gang,

We're currently looking through the various open source (and some 
commercial) offerings for the various needs of a game/simulation 
architecture.  This includes:
  - SDL for low-level input, and possibly sound, video, threading, and 
sockets.
  - DataReel for threading (amongst other things)
  - ImageMagick for image file reading
  - wxWidgets for the windowing environment (in addition to a 3D GUI 
toolkit)
  - ODE for physics, collisions, and general dynamics
  - maybe OpenSG or OpenSceneGraph for general architecture

Does anyone have experience with any of these packages for use with 
real-time graphical applications?  We don't mind not being cutting edge 
as most of our development is for the Military and Education arenas. We 
are a relatively small team that tends to get tasked with too many 
projects, so we're looking for packages that will help us get stuff done 
faster without sacrificing too much performance.

If you have suggestions for alternatives to the packages I listed, 
that's of interest to us as well.

Thanks in advance!

    Ron Hay
    Cybernet Systems Corp.




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