If I could add my plugin to this really old thread, it does exactly what was asked in the OP. https://wordpress.org/plugins/bbp-voting/
Not much. It’s a pretty small plugin that has 1 javascript file and 1 css file which enqueue properly so they can be bundled and minified by your caching plugin if you have one. It also doesn’t introduce any CDN resources. So, I would say the performance impact of this plugin is negligible.
Thanks, Robin! I’m glad you like it!
I know this thread is super old, but I thought I would jump in here to let anybody (who stumble upon this thread) know that I developed a free plugin in the WordPress plugin directory that adds voting to bbPress. https://wordpress.org/plugins/bbp-voting/
Just like the OP found, there was nothing out there that offered this pretty common functionality to a bbPress forum, so I developed my own plugin to do it. I hope you like it!
