A site with a good collection of Windows Open Source stuff: http://gnuwin.epfl.ch/apps/en/index.html/
Vector drawing tool, not quite ready on Windows, but close enough to warrant writing down for future reference: http://sketch.sourceforge.net/features.html
Commercial non-linear video editor will be going OSS: http://news.slashdot.org/article.pl?sid=10/04/14/2034255
Zentyal aims to be a drop-in SBS replacement. Claims to support Outlook w/o plugins!? http://www.zentyal.org/
Jitsi - video conference similar to Zoom or Webex - https://jitsi.org/
BigBlueButton - open source video and learning platform - https://bigbluebutton.org/
tags: open, source, oss, programs