Cartesian Origin - http://george.arc.nasa.gov/~jmelton/cartesian.html
Cart3D Home Page - http://www.nas.nasa.gov/~aftosmis/cart3d/cart3d.html
GALCIT - http://www.galcit.caltech.edu/~jjq/
Florida State University group led by Dr. Ching Jen Chen -  http://ceb213.eng.fsu.edu/fans.html
UC Berkeley led by P. Colella: -  http://barkley.berkeley.edu/cfd/colella_lab.html
ETH Seminar for Applied Mathematics -  http://www.sam.math.ethz.ch/
Courant Institute (Prof. M. J. Berger) -  http://cs.nyu.edu/cs/faculty/berger/
Research Institute for Advanced Computer Science -  http://ccf.arc.nasa.gov/ic/riacs.html

MGAERO from Analytical Methods, Inc -  http://www.am-inc.com/
ICEMCFD - http://www.icemcfd.com
TRANAIR Development Group at Boeing  -  http://www.nas.nasa.gov/NAS/TechSums/9394/Book/008_nas.html
CFDRC, Huntsville AL.USA  -  http://www.cfdrc.com/
Lockheed  -  http://www.nas.nasa.gov/NAS/TechSums/9293/15.html#HDT 11
adapco's Home Page -   http://www.adapco.com/index.html

  Computational Geometry
 

Computational Geometry Pages  -  http://www.cs.duke.edu/~jeffe/compgeom/
Computational Geometry Impact Task Force Report -  http://www.cs.duke.edu/~jeffe/compgeom/taskforce.html
Delaunay Triangulations From Hulls -  http://www.cs.dartmouth.edu/~gessel/Java/CGApp.html
Low dimensional Voronoi diagram, Delaunay triangulation  - 
http://www.geom.umn.edu/software/cglist/lowdvod.html
Compuational Geometry in C (J. O'Rourke) -  http://cs.smith.edu/~orourke/
Robust Predicates and Exact Arithmetic  -  http://www.cs.cmu.edu/%7Equake/robust.html
Spatial data structures  -  http://www.cs.kuleuven.ac.be/~rudim/spatial/spatial.html
Computer Science Comp.graphics.algorithms FAQ  -  http://vision.dai.ed.ac.uk/andrewfg/c-g-a-faq.html
PHOAKS: Resources for comp.graphics.algorithms  -  http://www.phoaks.com/phoaks/comp/graphics/algorithms/resources3.html 
comp.graphics.misc FAQ -  http://www.primenet.com/~grieggs/cg_faq.html
An Efficient Algorithm for Line and Polygon Clipping  -  http://www.cs.huji.ac.il/~arir/clip-abs.html
Computer Graphics:Clipping  -
 http://www.cc.gatech.edu/grads/h/Hao-wei.Hsieh/Haowei.Hsieh/mm.html#sec2_3
Polygon Clipping -  http://cs.fit.edu/courses/cse4255/cse5255/chang/