nvALT 2 is a fork of the original Notational Velocity with some additional features and interface modifications, including MultiMarkdown functionality. Developed by Brett Terpstra
License: Open Source
Google Keep is a versatile note-taking app that excels in collaboration and integration with other Google services, making it ideal for team projects. In contrast, nvALT offers a streamlined experience for users who prefer a distraction-free environment and markdown support, but lacks collaboration features and is limited to Mac users.