It is used for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system
Org Mode is a tool in the Code Collaboration category of a tech stack.
What are some alternatives to Org Mode?
Build and debug modern web and cloud applications. Code is free and available on your favorite platform - Linux, Mac OSX, and Windows.
Trello is a collaboration tool that organizes your projects into boards. In one glance, Trello tells you what's being worked on, who's working on what, and where something is in a process.
Sublime Text is available for OS X, Windows and Linux. One license is all you need to use Sublime Text on every computer you own, no matter what operating system it uses. Sublime Text uses a custom UI toolkit, optimized for speed and beauty, while taking advantage of native functionality on each platform.
Vim is an advanced text editor that seeks to provide the power of the de-facto Unix editor 'Vi', with a more complete feature set. Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems. Vim is distributed free as charityware.
Geckoboard, BugMuncher, Bitbucket, Bugsnag are some of the popular tools that integrate with Org Mode. Here's a list of all 4 tools that integrate with Org Mode.