The best open source alternative to Notecard is Notefox. If that doesn't suit you, our users have ranked more than 25 alternatives to Notecard and 13 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Notecard are StyncyNotes, Pinny Notes, Xpad and TotesNotes.
Take notes on any website, organize notes for whole domains or specific pages, access all in a management page, use export, import, tagging, search, sticky-notes, auto-saving, and customizable keyboard shortcuts, all in a locally stored browser extension.
Sticky Notes app for Android that understands the Linux Mint Sticky Note file for Sticky Notes + SyncThing = StyncyNotes
Pinny Notes is a sticky note application with a button to "pin" a note making it always on top above other windows. A number of other handy tools are also available via the right click menus.
I was tired of always having to start a new instance of notepad to take a note of something during my busy work day. All the other note applications seem very bulky and didn't really work with the fast pace that I work at.
Jot is that random piece of notes paper that lives in your Mac Menu Bar. It's also open source.
Sticky Notes is a simple sticky notes app for GNOME. It allows you to create notes and format them.
Scratchpad is a quick-and-dirty note-taking tool with a minimum of frills, meant to show up when you need it and get out of the way when you don't.
EverSticky is a simple application thats provides post-it notes for your Linux desktop. These notes auto-save and transparently syncronise to Evernote® (when a network connection is available).
Sticky is a digital sticky note application designed to help you organize your thoughts, ideas, and tasks in a visual and intuitive way. Organize thoughts, collaborate in real-time, and access your ideas from anywhere.
Italy
EU
