Upwork - Forget the old rules. You can have the best people. Right now. Right here.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Compose.ly - Compose.ly is a platform that connects businesses and agencies with freelance writers and provides high quality, SEO-friendly content.
Standard Notes - A safe place for your notes, thoughts, and life's work
CrowdSource - CrowdSource offers crowdsourcing solution to serve the needs of content and copywriting.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.