EU Alternatives to SynNotes

🇨🇿 Trilium Notes is a hierarchical note taking application.

🇮🇹 A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

🇪🇪 Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos and all sorts of other files.