sncli is a Python application that gives you access to your Simplenote account via the command line. You can access your notes via a customizable console GUI that implements vi-like keybinds or via a simple command line interface that you can script.
Magpie is an attempt to make a reasonably sufficient Evernote replacement where the users control their data.
Basically, magpie is just a web tool for managing text files in a git repo. In it, you can create notebooks (which are just folders); create, edit, and delete notes (which are just files). That’s pretty much it. However, when you make any of these changes, they are automatically committed to git.
With support for Markdown, checkboxes for todo lists and sharing notes via email.
Notograph is an iOS camera app designed “for pictures of sketches or business cards or whiteboards or napkins or signs or any other thing you want to remember but do not want in your camera roll or your Photo Stream”.
Notograph syncs images via iCloud or Dropbox, and lets you export them to Evernote.
Squarespace Note helps anyone record their ideas on the fly. Writers, bloggers, and others can use the app to record inspiration and ideas as they happen; notes can be sent via e-mail, or synced with a range of popular services including Squarespace, Evernote, Dropbox, Google Drive, and more.
A simple, clean note-taker; no Squarespace account required.