Justnotes is described as 'Capture your thoughts, ideas and todos - no formatting, just plain text. One window for one note lets you focus just on the text. Assign tags to your notes to organize them in your way. Favorite your most important notes with a simple click' and is a Note-taking Tool in the News & Books category. There are eight alternatives to Justnotes for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and Android. The best alternative is nvALT, which is both free and Open Source. Other great apps like Justnotes are Notational Velocity (Free, Open Source), Hyperdraft (Freemium, Open Source), Quiver (Paid) and nvPY (Free, Open Source).
Quiver is a notebook built for programmers. It lets you easily mix text, code and Markdown within one note, edit code with an awesome code editor, live preview Markdown and LaTeX cells, and find any note instantly via the full-text search.
Nocs aims to be the low-cost tool that makes it easy to browse, edit, and organize. Its power comes from offering utility while being easy, simple, and clean; we think twice before adding a feature if it adds complexity.