Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Xodo - Try easy-to-use PDF tools that keep your documents safe. Work with your important files across all platforms and devices with the ultimate all-in-one document solution. Your productivity lives at Xodo!
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Haihaisoft PDF Reader - Haihaisoft PDF Reader is the name of a free to use PDF reader and printer that is extremely simple to launch.
iTerm2 - A terminal emulator for macOS that does amazing things.