In Stacknote, you can stack blocks and build a document. That's just like a chat app's UI. That's blocks are called card. This idea is came from author's habit of taking notes in chat app and github issues's comment area.
Cards in a note are Sortable.
Like Slack, Twitter, Facebook etc, when you create a card containing links, simple previews are added. (There are some urls stacknote couldn't get site information)
In cards, you can write in GitHub-flavored Markdown with inline code syntax highlightings.
In a markdown code block, automatically language is detected and code is highlighted.
Only for a paid user, all notes are stored at the cloud. So you can get these on multiple devices.