Summer Institute in Algebraic Geometry
Three one-week sessions: Interactions with physics; Classical geometry; Arithmetic geometry. University of Washington, Seattle, WA, USA; 25 July -- 12 August 2005.
http://www.math.princeton.edu/~rahulp/seattle05.html

Fundamentals of Geometry
Free online book on geometry in pdf format. Contains material not easily found elsewhere from detailed exposition of elementary absolute geometry based on Hilbert's axioms to more advanced topics.
http://polly.phys.msu.ru/~belyaev/geometry.htm

Klein, Felix (1849-1925)
Plücker's assistant at Bonn who studied Analytic Geometry, describing geometry as the study of properties of figures which remain invariant under a Group of Transformations. He systemized Non-Euclidean Geometry.
http://scienceworld.wolfram.com/biography/KleinFelix.html

Journal of Geometry
Journal of Geometry - Journal of Geometry (JG) is devoted to the publication of current research developments in the fields of geometry, and in particular recent results in foundations of geometry, geometric algebra, finite geometri...
http://www.springer.com/west/home/generic/search/results?SGWID=4-40109-70-1177668-0

Geometry Formulas and Facts
Excerpts from the 30th Edition of the CRC Standard Mathematical Tables and Formulas (1995), namely, the geometry section minus differential geometry.
http://www.geom.uiuc.edu/docs/reference/CRC-formulas/

Geometry Algorithms
Resources for geometry algorithm software: geometry history, monthly algorithms and archive, books and journals, videos, and website links.
http://geometryalgorithms.com/

Geometry Formulas and Facts
An excerpt from the 30th Edition of the CRC Standard Mathematical Tables and Formulas, covering the area of Geometry (minus differential geometry), by Silvio Levy.
http://geom.math.uiuc.edu/docs/reference/CRC-formulas/

Geometry and the Imagination in Minneapolis
Geometry exercises for a two-week summer workshop led by John Conway, Peter Doyle, Jane Gilman and Bill Thurston at the Geometry Center in Minneapolis, June 1991.
http://www.geom.uiuc.edu/docs/doyle/mpls/handouts/handouts.html

Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry
Biannual journal on algebra, geometry, algebraic geometry, and related fields. Mostly in English.
http://www.emis.de/journals/BAG/

CASA 2.3
Computer Algebra Software for constructive Algebraic geometry. Designed for performing computations and reasoning about geometric objects in classical algebraic geometry, in particular affine and projective algebraic geometry over an algebraically closed field of characteristic 0.
http://www.risc.uni-linz.ac.at/software/casa/