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/

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

Doran, Charles  
   Columbia University. Geometry, mathematical physics, number theory.
   http://www.math.columbia.edu/~doran

Große-Brauckmann, Karsten  
   Differential geometry, especially surfaces of constant mean curvature.
   http://www.math.uni-bonn.de/people/kgb/Research/research.html

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

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

Hang, Fengbo  
   Veblen Research Instructor, Department of Mathematics, Princeton University. Subjects: geometric analysis, nonlinear partial differential equations, geometric measure theory.
   http://www.math.princeton.edu/~fhang/

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

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/

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

Rollin, Yann  
   Low-dimensional geometry.
   http://www-math.mit.edu/~rollin/

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/

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/

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/

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 preprin
   http://www.math.uiuc.edu/~glazebro/

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

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

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