Cvrkut is an ecosystem for literates (literary writerts). It helps literates to write creatively, organize their work and augment the process with stylometric analasis, knowledge references, etc.
It supports social processes between literates, where they can help each other, ask and provide suggestions on their work.
It also helps to understand better the process and motives of writing by literates participating and working with literary scholars.
The system was reimplemented in its basic form in three variations: 1) backend generated PHP, 2) frontend framework + backend PHP, 3) frontend framework + backend node.js.
Currently we are migrating it to the more advanced collaboration framework: Colabo.Space. In the meantime, you can see the usecase diagram and the UI-diagram.