NoteLedge

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Deepnote

A free note-taking service developed by Google. With Google Keep you can quickly capture what's on your mind and get reminded at the right time or place. Google Keep is available on the web, and has mobile apps for the Android and iOS mobile operating systems. You can use your original Google Account, email or phone to access your notes stored in Google's cloud.

Turtl is a note taking application that uses high-end cryptography to protect your data. Whether you're worried about information leaks, competitive advantage, or blanket government surveillance, Turtl works hard to make sure only you, and those you choose, can see your data.

Orginize your notes effortlessly in the cloud with Evernote. The application is designed or note taking, organizing, task management, and archiving. With Evernote users can find information and take notes in the form of text, drawings, photographs, or saved web content that can be shared with anyone. Evernote is available cross platform and is free to sign up for, however premium features are provided at a monthly cost.

The Jupyter Notebook is an open-source web application that allows you to create and share documents that contain live code, equations, visualizations and narrative text. The Jupyter Notebook is primarily used in data science for data transformation and cleaning, numerical simulation, statistical modeling and machine learning.

IPython is a powerful, free and open-source interactive shell used for interactive computing. It's an alternative to the Python interpreter that provides improvements over its default counterpart. These improvements include syntax highlight, proper indentation, documentation, and much more. With iPython, you can use Jupyter notebooks to create reports that contain live code, charts, and more interesting things for data science and data visualisation.