OpenTodoList is a todo list and note taking application

Organize todo lists,

notes and images in libraries, which can be stored either completely local

on the device you are working on (and hence ensure no information leaks out

to untrusted third parties) or use the built in synchronization features which

allows you to synchronize your libraries across devices using your self-hosted

NextCloud or ownCloud server, other WebDAV servers or Dropbox

In addition, a library

is just a directory holding the items of your library as simple files - this

allows you to use any kind of third party synchronization tool

to sync your information.