This is a very simple notes plugin for Roundcube. Primarily notes in HTML format but also images (jpg) and PDF files are supported. The files are stored in a compatible format to TagSpaces, so that you can transfer these notes directly.
Originally, the idea for a standalone note app came from that I wanted to separate my notes from Evernote. Afterwards I ended up at TagSpaces. As TagSpace was too slow and extensive for me personally, I decided to develop my own app. This resulted in a standalone project and now this plugin for Roundcube.