Eve is described as 'programming language and IDE that focuses on the human programmer rather than the machine. It uses a unique, document approach where programs look like documents with embedded code' and is an app in the Development category. There are more than 10 alternatives to Eve for a variety of platforms, including Online / Web-based, Mac, Windows, Linux and Self-Hosted solutions. The best alternative is Jupyter, which is both free and Open Source. Other great apps like Eve are Light Table (Free, Open Source), Observable Notebooks (Free), Projucer (Freemium) and iodide (Free, Open Source).
Light Table is a new interactive IDE that lets you modify running programs and embed anything from websites to games. It provides the real time feedback we need to not only answer questions about our code, but to understand how our programs really work.
Polynote is a different kind of notebook. It supports mixing multiple languages in one notebook, and sharing data between them seamlessly. It encourages reproducible notebooks with its immutable data model.