Google Keep
Free
Google Keep is a cloud based note taking application.
Simplenote
Open Source
Simplenote is an easy way to keep notes, lists, ideas and more.
WizNote
Freemium
WizNote is a cross-platform cloud based note-taking client.
Leanote
Open Source
Leanote is a self-hosted note taking app.
GNotes
Freemium
GNotes is a simple and clear note app. It is available for you to take notes, keep a diary, write down ideas, create checklists, etc.
Notezilla
Commercial
Notezilla is a sticky notes app for Windows.
TiddlyWiki
Open Source
TiddlyWiki is an open-source single page application wiki in the form of a single HTML file that includes CSS, JavaScript, and the content.
Nuclino
Freemium
Nuclino is a cloud-based team collaboration software which allows teams to collaborate and share information in real-time.
Zoho Notebook
Free Personal
Zoho Notebook takes the same catch-all approach as Evernote and OneNote, but has a few design ideas of its own.
BeeCanvas
Free Personal
BeeCanvas is an online whiteboard based visual collaboration tool.
Compare Tomboy with alternatives
Compare Zoho Notebook and Tomboy and decide which is most suitable for you.