SynNotes is described as 'Simple syntax highlighted Notes manager with incremental full-text search and GMaill like tags as folders' and is an app in the Development category. There are more than 50 alternatives to SynNotes for a variety of platforms, including Windows, Mac, Android, Online / Web-based and Linux. The best alternative is Joplin, which is both free and Open Source. Other great apps like SynNotes are Standard Notes (Freemium, Open Source), Evernote (Freemium), Simplenote (Free, Open Source) and CherryTree (Free, Open Source).
This program is a structured notetaking application based on GTK+ 3. Write your notes in instantly-formatted Markdown, organise them in a tree of folders that can be instantly navigated from within the program, and add hand-drawn notes by mouse, touchscreen or digitiser.
MixNote is a mobile note taking app, like a memo pad or notepad. Take note of every deserved thing, with text, ToDo, voice and picture. You can take notes, write memos, create to-do list, record voice and add pictures in MixNote. Make your notes more varied and interesting.