mathlearningworld
Lurker
eZ Logic also provide a very simple text editing with hand note function to link to each edited topic. Each edited topic also can be setting a different word color, different font or text with a picture mixed. it also can be a very good tool for slides show and simple teaching tool.
You can check it on this platfrom.
https://play.google.com/store/apps/details?id=com.bn.eZL
You can check it on this platfrom.
https://play.google.com/store/apps/details?id=com.bn.eZL