Note Applications…Compareable to Tomboy?

Hi Guys!
I have a question/discussion topic…Since years i have been working with Tomboy and after all those years i have gathered about 700 Notes, some short some longer. I always used Tomboy within KDE although i known it is an gnome application…Anyway i tried some other note applications but i came back to tomboy because it supports synchronization with my owncloud and it has an android app, so that i can bidirectionally sync my notes. Furthermore the linking system of the notes is very useful after many years of constantly adding new notes……Recently i came across some bugs and saw, that tomboy is not really being developed anymore. So the questions arises, if there is a comparable application which is up-to-date to new systems and kde 5? Any ideas around here?