Add hackmd to editors section

README.md

@@ -688,7 +688,7 @@ See https://github.com/n1trux/awesome-sysadmin#distributed-filesystems
 ## Learning and Courses
 
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   * [Canvas LMS](https://www.canvaslms.com/) - Canvas is the trusted, open-source learning management system (LMS) that is revolutionizing the way we educate. ([Demo](https://canvas.instructure.com/register), [Source Code](https://github.com/instructure/canvas-lms)) `AGPLv3` `Ruby`
   * [Chamilo LMS](https://chamilo.org/chamilo-lms/) - Chamilo LMS allows you to create a virtual campus for the provision of online or semi-online training. ([Source Code](https://github.com/chamilo/chamilo-lms)) `GPLv3` `PHP`
   * [edX](https://www.edx.org/) - The Open edX platform is open-source code that powers [edX.org](https://www.edx.org/). ([Source Code](https://github.com/edx/)) `AGPLv3` `Python`
@@ -830,6 +830,7 @@ See https://github.com/n1trux/awesome-sysadmin#monitoring and https://github.com
   * [savepad](https://github.com/novavex/textpad) - A minimalist notepad based on notepad.cc. `MIT` `PHP`
   * [ShareLaTex](https://www.sharelatex.com/) - A web-based collaborative LaTeX editor. ([Source Code](https://github.com/sharelatex/sharelatex)) `AGPLv3` `Ruby`
   * [Turtl](https://turtl.it/) - A totally private personal database and note taking app. ([Source Code](https://github.com/turtl)) `GPLv3` `CommonLisp`
+  * [HackMD](https://hackmd.io) - A feature-rich collaborative online markdown editor. ([Source Code](https://github.com/hackmdio/hackmd/)) `MIT` `JavaScript`
 
 
 ## Office Suites
@@ -884,7 +885,7 @@ See https://github.com/n1trux/awesome-sysadmin#monitoring and https://github.com
   * [tastebin](https://github.com/andreineculau/tastebin) - Updated version of hastebin plus additional features. `Apache` `Nodejs`
 
 
-## Personal Dashboards 
+## Personal Dashboards
 See https://github.com/n1trux/awesome-sysadmin#metric--metric-collection
 
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@@ -1055,7 +1056,7 @@ See also [Static site generators](#static-site-generators)
   * [Read the Docs](https://docs.readthedocs.org/en/latest/install.html) - Host documentation, making it fully searchable and easy to find; import your docs using any major version control system, including Mercurial, Git, Subversion, and Bazaar. ([Demo](https://readthedocs.org/projects/), [Source Code](https://github.com/rtfd/readthedocs.org)) `MIT` `Python`
 
 ### Localization
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   * [Parrot](http://anthonynsimon.com/parrot.github.io/) - Self-hosted Localization Management Platform built with Go and Angular 2.. ([Source Code](https://github.com/anthonynsimon/parrot)) `MIT` `Go`
   * [Pootle](http://pootle.translatehouse.org) - Online translation and localization tool. ([Source Code](https://github.com/translate/pootle)) `GPLv3` `Python`
   * [Weblate](https://weblate.org) - Web-based translation tool with tight version control integration. ([Demo](https://demo.weblate.org), [Source Code](https://github.com/WeblateOrg/weblate)) `GPLv3` `Python`