i found my love in Trilium what has everything i need and if needed, i can still change the code by myself (AGPL) + files are stored as markdown documents (so i am still able to get into my notes, even if the repo would disappear). see
https://github.com/zadam/trilium
TLDR;
- future proof file format (markdown)
- possible as local standalone + sync to simple cloud storage (like gdrive/dropbox/...)
TLDR; - future proof file format (markdown)
- possible as local standalone + sync to simple cloud storage (like gdrive/dropbox/...)
- gantt charting
- uml diagramming
- task management
- available on github
- active development in the last months and years
- editable