Microsoft OneNote Alternatives for Firefox

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, can be copied, tagged and modified either from the applications directly or from your own text editor.

Whether it's bookmarks or passwords, files or shopping lists...Turtl organizes it all and makes it easy to find later. Sync across your devices. Leave nothing behind.

Trilium Notes is a hierarchical note taking application.

A productivity and task management tool appropriate for both individuals and businesses. With Nimbus Note users can create notes and to-do lists, share them with others, and archive important data.

myBase is a unique free-form database software that allows entry of unstructured text, webpages, images, documents, emails and even arbitrary files without regard to length or format. All information is automatically compressed and stored in the tree structured outline form.

Web Clipper that works! The easiest way to clip text, pics, links, email and pdf from internet pages and save them.

MindSky is a place for all your notes and ideas. It allows you to organize thoughts in a way nowhere else does. Highlight and share articles or ideas with others. It's designed to be simple.

Productivity app. Save information like a sticky notes. You can create notes with images, videos or whatever you want. Save pages to read later or capture any web content with the chrome or firefox extension. Share boards with your friends. Create public boards.

RightTasks places your Google Tasks in a right sidebar in Gmail, like in Google Calendar.