PDF Editor for Free - pdfgear

https://www.pdfgear.com/download/

A good Markdown file viewer/editor

https://stackedit.io/

How to give author, editor, viewer permissions to room calendars?

On exchange server 2010, Exchange Management Console, mailbox > 'new mailbox' > 'room mailbox' > 'new user' 

On active directory, you will see the new room mailbox, disabled. Enable it. Create a password.

On EMC, 'distribution group' > 'new distribution group', create groups to be given (author, edit, review) permission to the new room mailbox.

Add users to each distribution group.

Log on any computer with the new room user. Open MS Outlook > new room mailbox calendar, grant each group permission to the new room mailbox calendar. (After a user is migrated to Office 365, we then can not add remote user to room calendars)

Good Text Editors

 Good Text Editors

1. Sublime Text 3

2. Vim

Free audio recorder/editor, video live-streamer/recorder, video editor

Free audio recorder/editor - Audacity.

Free video live-streamer/recorder - OBS Studio.

Free video editor - OpenShot Video Editor; VideoPad; VSDC Video Software.