We have had the option to create what has been called a Power Apps Community Plan, which gave us free individual environments with minimal limitations. If you were on this version of the developer program before it was updated, you keep your old one but can now also enjoy new perks! This plan will be re-branded as a Power Apps Developer plan and includes updates such as sharing apps for development or test purposes and having more environment options available during practice periods.
You can get your free developer plan here: https://aka.ms/PowerAppsDevPlan
Why not use this free developer environment to build something new and exciting? Then share it with the community!