MirrorCreator - Upload one file of 400 megs or less to multiple free file hosts -- 14 at most. 25 possible hosts.
Documize - Enterprise-grade wiki and knowledge management platform
DirectMirror - Directmirror.com uploads your file to several free hosting providers.
HackMD - Fast and flexible, real-time collaborative markdown, inspired by Hackpad.
UploadMagnet - UploadMagnet service mirrors your files to multiple sites.
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.