You may checkout Mytetra, it supports the following: - Runs on windows, linux, freebsd (sorry no Android) - Create notebook/sub-notebook/ - Paste/save images from clipboard/web (sadly that it can only paste images when you choose copy image and can't paste a selection with a mix of text and images - tested in firefox & chrome in Linux Mint, maybe this is a bug in Linux Mint clipboard) - Default file format is html - Under developing - Create tags - Insert/edit table (only add/remove rows/column, lack advanced formatting, but still much better than cherrytree or zimwiki) - May be setup for sync - Portable (even on linux) - Support encryption
In my opinion, this is the best note app for linux at the moment.