There are free tools from top RPA providers like Uipath and Workfusion. Here are the links to download them. Note that these are “free” and not open source. Please review the licenses before you use it for your specific need.
(look for community edition)
I have more links for free tools to get started here:
Here are some open source tools I could find. I have not explored them and not much is known about these tools. So you will have to explore and do your due diligence.
Note that Most of them would need more advanced developer capabilities and would be more tedious. Also, the feature set would be limited.
A quick review about this tool:
Robot Framework :
I have seen people use Test Automation tools.
You can also just use common language like Python. This is a good place to start: