People

Anderson, Jim
University of Southampton. Hyperbolic geometry, mostly in dimensions 2 and 3, and its connections to other areas, such as the geometry and topology of 3-manifolds and Riemann surfaces. Preprints and teaching material.
http://www.maths.soton.ac.uk/staff/Anderson/

Ballmann, Werner
Rheinische Friedrich-Wilhelms-Universität Bonn. Differential geometry; geometric topology.
http://www.math.uni-bonn.de/people/hwbllmnn/

Banchoff, Tom
Brown University. Geometry, visualisation; Popularisation.
http://www.math.brown.edu/~banchoff/

Bestvina, Mladen
Geometric group theory. Includes a problem list.
http://www.math.utah.edu/~bestvina/

Calegari, Danny
Specializes in topology and classical geometry. Department of mathematics. California Institute of Technology.
http://www.its.caltech.edu/~dannyc/

Chang, Sun-Yung Alice
Director of Graduate Studies, Department of Mathematics, Princeton University. Subjects: geometric analysis, algebraic geometry, differential geometry.
http://www.math.princeton.edu/~chang/

Cherowitzo, Bill
Finite geometry. Department of Mathematics. University of Colorado at Denver.
http://www-math.cudenver.edu/~wcherowi/

DeLaVina, Ermelinda
University of Houston Downtown. Computational geometry - Graffiti. Publications and software.
http://cms.dt.uh.edu/faculty/delavinae/

Dodson, C.T.J. (Kit)
Manchester. Differential geometry, stochastic geometry and applications.
http://www.maths.manchester.ac.uk/~kd/homepage/dodson.html

Dunfield, Nathan
Caltech. 3-dimensional topology, geometry, and related topics.
http://www.its.caltech.edu/~dunfield/

Glazebrook, James F.
Eastern Illinois University and University of Illinois at Urbana-Champaign. Differential Geometry and its Applications to Mathematical Physics; Index Theory and Foliations; Holomorphic Vector Bundles; Noncommutative Geometry. Books, articles and preprints.
http://www.math.uiuc.edu/~glazebro/

Hales, Thomas C.
University of Pittsburgh. Kepler conjecture (announced a computer-aided proof), other space tiling conjectures, Langlands theory.
http://www.math.pitt.edu/~thales/

Kapovich, Michael
University of Utah. Low-dimensional geometry and topology.
http://www.math.utah.edu/~kapovich/

Keith, Sandra Zaroodny
St. Cloud State University MN. Interests in visualisation and education.
http://web.stcloudstate.edu/szkeith/

Kimberling, Clark
Triangle centers, integer sequences, mathematical history and biography.
http://faculty.evansville.edu/ck6/

Palais, Richard
Differential geometry, mathematical visualisation.
http://rsp.math.brandeis.edu/

Sormani, Christina
Lehman College and CUNY Graduate Center. Riemannian reometry: manifolds with Ricci curvature bounds, their Gromov-Hausdorff limits and metric spaces.
http://comet.lehman.cuny.edu/sormani/

Sullivan, John M.
Optimal geometries.
http://www.math.uiuc.edu/~jms/