Growing up, I learned that creativity was grown by constraints. I became resourceful because of the lack of resources. That attitude has helped me keep going when everything around me said stop.
From time to time, you find a tool that is God sent. It meets a clear need in your life. As a developer, I don't see how I would ever buy Adobe Photoshop. However working with designers means that I need a way to open the PSD files sent to me.
In comes Photopea. Photopea is a free online photo editor with excellent support for PSD, XCF and Sketch files.
This means that you can open files from Adobe Photoshop, GIMP and Sketch App. GIMP is the open source competitor to Adobe Photoshop while Sketch App is a great Mac only design tool.