You asked for it, here it is!
A totally free, open source version of DaReactions has been released this month, you may download it now from WordPress official Plugins’ directory: https://wordpress.org/plugins/da-reactions/
All main features of the plugin are included in free version, with some limitation. Take a look at the features comparison table.
What are you waiting for? Open your WordPress admin area and and click on Plugins » Add New, search for da-reactions and complete installation.