Google's Chrome Remote Desktop leverages the Chrome browser's functionality for remote access to your computers, as well as single-session support. Because it's browser-based, it supports numerous platforms, and is the only solution we know of for Chrome OS.
Mac users might not know that they have a fee PDF editor at their fingertips embedded in the macOS image editor. That's a shame since it offers a full set of editing and markup tools that can handle most PDF tasks.
TeamViewer is the easiest free remote connectivity software on the planet. Download it (both parties), run it, and you can help a friend fix their computer's software problems or have them help you with yours.
McAfee Total Protection offers highly rated security, decent pricing, and a new desktop design on Windows. The app design isn't as straightforward as it could be, but overall Total Protection offers a lot of value.