There are some software that your should installing after installed ubuntu .
1 open source: ArduinoIDE Fritzing(Drawing circuit) FileZilla(ssh) VNC Viewer
2 E-Book: calibre
3 Browser: Firefox Google Chrome Yandex
4 Reader: Foxit Reader
5 Simulating Gazebo Matlab
6 Image Inkscape
7 Player SMPlayer
8 Code Editor Sublime Text Vim