Evernote

 Evernote  is a suite of software and services used for note-taking and archiving. Evernote software is available on a variety of different platforms and user data is stored locally in a proprietary format. Evernote services provide a means to back up / synchronize data across devices.

How to leave
It describes several key points about leaving Evernote and may help you do so:
 * See 2016-11-18 How to Leave Evernote?
 * Why do I want to leave?
 * What I don’t like about Evernote
 * What I like about Evernote

Features

 * Notes don't need to be named in order to be stored
 * Categorization via tags and "notebooks"
 * Full-text search, faceted search, and seach-within-images via OCR
 * Note context like date and location is stored automatically
 * Inline images within notes
 * The ability to embed any kind of file within a note
 * Easy note-capture via the app, website, bookmarklets, browser extensions, or via email

Integration
A variety of apps and services integrate with Evernote including:


 * Confluence, Atlassian's enterprise wiki
 * Whitelines Link, an iOS app for scanning documents (also has email and Dropbox integration)
 * IFTTT - see evernote blog post

Data Export
Evernote data can only be exported via the desktop application and is available in either HTML or the Evernote XML format (.enex).

Criticism

 * "Evernote’s employees read your private notes in order to “improve machine learning”!"
 * "You cannot opt out of employees looking at your content"