FGA EGA SGA english index
A short Grothendieck biography: Part I and Part 2
Most of his publications including EGA, are online at NUMDAM. For SGA, see here. For SGA1 and SGA2, see also the LaTeXed versions at arXiv. For SGA3, see Gille and Polo
Lots of scans of Grothendieck writings, including Tohoku, Pursuing stacks, various letters on motives, and Recoltes et Semailles.
See also Joyal: A letter to A. Grothendieck (1984)
A. Grothendieck, Techniques de descente et Th´eor`emes d’existence en G´eom´etrie Alg´ebrique, expos´es dans le S´eminaire Bourbaki entre 1959 et 1962.
http://ncatlab.org/nlab/show/EGA
Publications:
nLab page on Grothendieck