Open Broadcaster

openbroadcaster

• https://openbroadcaster.com/ — main site
• https://obsproject.com/ — OBS Studio

Works with Twitch and YouTube Gaming
Linux, Windows, and Apple versions available
Main site features: Broadcast Automation, Emergency Alerting Systems, Media Asset Management, Language Preservation Tools, Streaming Media, Service and Training

Found on GitHub: https://github.com/jp9000/obs-studio/wiki/OBS-Studio-Overview

Sumatra PDF Reader for Windows

Sumatra PDF Reader for Windows

Reads these formats: PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader
Comes in 32-bit & 64-bit versions
Full install or portable
Works on these Windows Versions: XP, Vista, 7, 8, and 10

*I've had really good luck using Sumatra PDF Reader on PDFs that Adobe Reader cannot open.

Open VPN

Excerpt from the OpenVPN website:

OpenVPN is a full-featured SSL VPN which implements OSI layer 2 or 3 secure network extension using the industry standard SSL/TLS protocol, supports flexible client authentication methods based on certificates, smart cards, and/or username/password credentials, and allows user or group-specific access control policies using firewall rules applied to the VPN virtual interface. OpenVPN is not a web application proxy and does not operate through a web browser.

Open Simulator

Open Simulator

Use this program to host 3D virtual worlds.
Good for commerical or private use.
Works on Windows and UNIX.