viXra

[1][2][3] It was set up by independent physicist Philip Gibbs as an alternative to the dominant arXiv service operated by Cornell University.

[4][5] Although dominated by physics and mathematics submissions, viXra aims to cover topics across the whole scientific community.

[4] The e-prints on viXra are grouped into seven broad categories: physics, mathematics, computational science, biology, chemistry, humanities, and other areas.

[6] Anyone may post anything on viXra, though house rules do prohibit "vulgar, libellous, plagiaristic or dangerously misleading" content.

[2] Gibbs originally started the archive to cater to researchers who believed that their preprints had been unfairly rejected or reclassified by the arXiv moderators.