Linux

RSS desktop client able to integrate with multiple online services.

Desktop presentation app.

Desktop presentation app.

Facebook's Messenger client with some added privacy features.

Pushbullet client.

Instagram client.

Evernote client based on the web version.

A GUI for the dnf package manager.

Yay is one of the many wrappers to pacman which automatically downloads and installs packages from AUR, a full list can be found here.

Secure, multilingual package manager.

Using AppImageKit you can package applications in the AppImage format that runs on common Linux-based operating systems, such as RHEL, CentOS, Ubuntu, Fedora, debian and derivatives; one app = one file.

Command line tool which corrects your previously mistyped command.

Vim-inspired file manager for the console.

Fetches system/theme information in terminal.

Static analysis tool for shell scripts.

Test your Internet connection speed and ping using speedtest.net.

Text-mode interface for git. It functions mainly as a Git repository browser.

Easily-extendable activity monitor.

Monitoring application for wireless network devices.

A tool to download videos from YouTube and other video sites.

If you used Windows and decided to switch to Linux, this course should help you to find their alternatives. It's pretty short and you can finish it in a day. - @aleksandar-todorovic