add visidata

README.md

@@ -876,6 +876,7 @@
 - [![Open-Source Software][OSS Icon]](https://github.com/tmux/tmux) [Tmux](https://github.com/tmux/tmux) - It lets you switch easily between several programs in one terminal, detach them (they keep running in the background) and reattach them to a different terminal. And do a lot more.
 - [![Open-Source Software][OSS Icon]](https://github.com/cosmos72/twin) [Twin](https://github.com/cosmos72/twin/) - Fast, lightweight text-mode window environment with mouse support. Enables multiple terminals in a single Linux console, terminal or X11 window. It can be detached (keeps running in background) and reattached to a different console, terminal or X11 server. Works on Linux, Mac OS X and BSD.
 - [![Open-Source Software][OSS Icon]](https://github.com/railsware/upterm) [Upterm](https://github.com/railsware/upterm) - Upterm (formerly Black Screen) is an IDE in the world of terminals. Strictly speaking, it's both a terminal emulator and an interactive shell based on [Electron](https://electronjs.org/).
+- [![Open-Source Software][OSS Icon]](https://github.com/saulpw/visidata) [Visidata](http://visidata.org/) - A terminal spreadsheet multitool for discovering and arranging data.
 - [![Open-Source Software][OSS Icon]](http://invisible-island.net/xterm/) [Xterm](https://invisible-island.net/xterm/) - The Xterm program is a terminal emulator for the X Window System. It provides DEC VT102 and Tektronix 4014 compatible terminals for programs that can't use the window system directly.
 - [![Open-Source Software][OSS Icon]](https://github.com/KDE/yakuake) [Yakuake](https://yakuake.kde.org/) - A Quake-style terminal emulator based on KDE Konsole technology.