OpenCroquet / Cobalt
Oblong G-Speak
Piccolo2D
EagleMode
Skyrails
CrystalUI
InstantReality
JMonkeyEngine
Mozilla Aurora
Grape
Genode
JNode
O3D
Digital Spaces
Vis / Space
SixthSense
CavernSoft
Alice
Looking Glass 3D
Clutter
Zooming Interfaces Group
Vovoid
OpenCog
TexAI
NARS
jACT-R
SemanticDesktop (Nepomuk)
AdaptiveAI
IRIS / SIRI
OpenRDF
Knowledge Reef
PrimalFusion
HypergraphDB
Twine