Hosted by the American Mathematical Society, AMS Open Math Notes is a repository of freely downloadable mathematical works for researchers, teachers and students. It includes course notes, textbooks, and research expositions in progress. In progress means the documents may be subject to significant revision. It can be accessed by level, potential course type, and topic.
A fully automated electronic archive and distribution server for research papers covering physics, mathematics, nonlinear sciences, computer science, and quantitative biology.
Current URLs & e-mail contacts of all mathematical preprint & e-print servers throughout the world.
European Libraries Electronic Resources (EULER) in mathematical sciences provides searching capability to find resources such as books, pre-prints, Web sites, abstracts, proceedings, serials, technical reports, and thesis.
A user-friendly interface with a search engine to the mathematics e-prints in the arXiv.org e-Print archive.
IMS Preprint Server at SUNY Stony Brook may be searched or browsed & provides full-text preprints from 1990 forward.
From the University of Illinois Department of Mathematics, it contains preprints dealing with K-theory. The Archives may be searched or browsed.
Faculty research reports from the UCLA Mathematics Department.
Preprints from the Mathematical Sciences Research Institute, 1995 to present.
This is an eprint repository for optimization and related topics. It may be searched or browsed, or a monthly email digest is available via a free subscription.
viXra.org (reverse of arXiv) is a preprint archive alternative. It places no restrictions on the sorts of papers that can be posted.
Maintained by the Swiss Federal Institute of Technology, it is part of the wavelet.org Website. Issued regularly since 1992, The Wavelet Diget includes preprints as well as meeting announcements, calls for papers, software resources, book reviews, theses, tables of contents, and job announcements. No longer being updated as of 2012.