Free services for the public is now hosting a suite of free & open source tools for public use:

send: a tool to quickly, privately and securely share files which get encrypted before being uploaded - no user registration required

privatebin: a minimalist zero-knowledge pastebin - no user registration required, contents get encrypted before being uploaded

etherpad: a real-time collaborative text editor with built-in chat that requires no user registration

whoogle: a less privacy-invasive way to use google search - no ads, javascript, AMP links or tracking