Openboard is dead and hasn’t been developed in years. If you want an updated version of that, go with Heliboard. Futo also has voice to text capabilities. I currently have heliboard and futo both installed, buy may just switch to futo.

I’m running synapse just fine on an old ThinkPad. Doesn’t seem to be terrible on resources. I also have my lemmy instance on the same laptop and don’t have any issues with resources.