Multimedia files are easy to convert – if you have the right tools. This month we look at some useful applications that convert video and audio files.

Automated web logins with command-line tools and Selenium ensure you don't miss scheduling an activity.

This month Graham looks at Penpot, ProcMon, diskgraph, Shaarli, Music Radar and more!

Create your own weighing device with easily available components and open source software.

Short snippets using animated GIFs are often sufficient to show what's happening on your desktop. With menyoki, you can create these animations from the command line.

Xournal brings the whiteboard to the PC to aid in all of your online learning activities.

Z-Wave components, a RaZberry module, and the free Home Assistant software make the Raspberry Pi a powerful smart home control center.

JSON data format is a standard feature of today's Internet – and a common option for mobile and desktop apps – but many users still regard it as something of a mystery. We'll take a close look at JSON format and some of the free tools you can use for reading and manipulating JSON data.

The Zenity command-line utility lets you create simple dialog boxes with your own data or with the output of utilities and applications.