People tend to be afraid to use software without an explicit license do to the way copyright works (at least in the US). If you don't explicitly give people permission to use your software, you maintain the full copyright rights to the work. In other words, if I started using your software and you decide you want to charge for the software after all, you could go ahead and sue me.
If you want people to "do what they want" with your software, the MIT license or BSD license is probably the closest to this sentiment. Pick one and add it to your project, it will make it much more comfortable for other devs to pick up your code.
> I don't know. Do what you want.
People tend to be afraid to use software without an explicit license do to the way copyright works (at least in the US). If you don't explicitly give people permission to use your software, you maintain the full copyright rights to the work. In other words, if I started using your software and you decide you want to charge for the software after all, you could go ahead and sue me.
If you want people to "do what they want" with your software, the MIT license or BSD license is probably the closest to this sentiment. Pick one and add it to your project, it will make it much more comfortable for other devs to pick up your code.