Go cross-platform

VECTOR IMAGE EDITING - Competing with the likes of Adobe Illustrator is no easy task, but Inkscape holds its own by adding hugely powerful SVG features to the vector graphic tool set. Topping that off, it's available on Windows, Mac and Linux.

3D GRAPHIC EDITING - Renowned worldwide for its powerful and encompassing 3D development tool set and intuitive workflow, Blender is also equally at home with all the major operating systems. A lesser known fact, Blender is also very adept as a cross-platform video editor.

TEXT AND CODE EDITING - Atom has a downright beautiful interface that makes code and text editing fun. It's also fully customizable and hackable and brings all that great functionality to all major OSes.

IMAGE EDITING / DRAWING - Krita is a full-featured, Photoshop-like image editor with a powerful focus on painting. It also sports a ton of innovative features of its own, with more being added consistently by way of a hugely supportive community. Krita works across all the major platforms.

SCREEN RECORDING - OBS is a screencasting beast. It loads and runs blazing fast, covers all the essentials with an extensive feature set and it works on Mac, Windows and Linux, with the same, intuitive workflow being available for each.

GAME DEVELOPMENT - One of the most powerful game development environments, Godot is also one of the select few that works across multiple platforms, including Mac, Windows and Linux.

SOUND EDITING - One of the fastest audio editors around, Ocenaudio provides a super intuitive interface and robust feature set that expedites audio editing tasks across all major systems.

MUSIC PRODUCTION - One of those rare audio apps that works across major desktop platforms including Linux, Bitwig Studio is a full featured, commercial DAW with a workflow that successfully balances traditional composition with Ableton-like sequencing. It's not free, but it's a powerhouse of music creation.

TERMINAL - Commandline experiences vary across platforms, making cross-platform work tedious. Hyper can help by providing the same core, terminal experience on Mac, Windows and Linux. It's free and uses familiar web technology for configuration.