Algebraic Functions and Projective Curves: Home page of the book by David Goldschmidt. Full text (registration required), errata, discussion forum.
ArXiv Front - Algebraic Geometry: Papers and preprints.
Borcherds' Solutions to Hartshorne: Solutions to the exercises in chapter 1 of Hartshorne's "Algebraic Geometry"
Computations in Algebraic Geometry with Macaulay 2: Edited by David Eisenbud, Daniel R. Grayson, Michael E. Stillman, and Bernd Sturmfels. Full text in DVI, PS and PDF.
Grothendieck's Séminaire de Géometrie Algébrique: Scanned from the original typescript into JPEG format.
Ideals, Varieties, and Algorithms: By David A. Cox, John B. Little and Don O'Shea. Errata, solutions, Maple and Mathematica software.
Journal of Algebraic Geometry Online: Tables of contents, abstracts and references from vol.11 (2002). Full text to subscribers (TeX, DVI, PDF, PS).
Mirror Symmetry and Algebraic Geometry: By David A. Cox and Sheldon Katz (American Mathematical Society, 1999). Errata.