Use Open Source…

What is Open source vs Free software?
Open source and free software are NOT the same.
Open Source means: The source code for the software is open for everyone to see and maybe open for you to change, update, fix, add your own features BUT the source code that you write may then “belong” to the company who “owns” the software. For example MySQL is now “owned” by Oracle.
Free Software.
Hum. This can be difficult to explain… There are two type of “free”
Free (as in Free Beer!) aka no cost. Shareware and Freeware are two examples of this. Freeware is often a “cut down” version of some useful program where you can use as long as you like but if you want the extra “premium” feature then you have to pay to upgrade or unlock the good bits.
Free (as in Freedom) aka you can do with it whatever you want. Free in this context is sometimes called ‘Libre’. (The French usefully have two words for the different types of free, the English language does not). This freedom allows you to take the code, modify it (or not), repackage it, distribute it, even sell it for profit.