Monkkee - Keep a private journal securely on the Internet – to provide a convenient user experience your...

Readwise - Effortlessly rediscover and organize your Kindle highlights

Scrapbox - A new style of note-taking that lets you create, discuss, and learn together in one self-organizing space.

Knotes - An efficient, beautiful Kindle highlights & notes manager

Idea Notebook - Idea Notebook is an app that allows you to keep track of your logs business ideas and track as well as organize them.

Clippings.io - Organize the notes you make on your Kindle