pinup - Pinup.com is quick and easy to take sticky notes and share with your friends. It's Simple to use.
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.
Sticky Notes - Sticky Notes is an integrated feature of adding notes in the Windows operating systems.
Standard Notes - A safe place for your notes, thoughts, and life's work
Lucidspark Online Sticky Notes - Lucidspark Online Sticky Notes provides teams with a full-screen canvas to create notes, discuss thoughts, share experiences, or initiate voting to reach a suitable decision.
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.