Antconc - The website of Laurence Anthony. Professor at Waseda University Japan, developer of AntConc, a freeware concordancer software program for Windows, Linux, and Macintosh OS X
Observable - Interactive code examples/posts
Voyant Tools - Voyant Tools is a web-based reading and analysis environment for digital texts.
nbviewer.org - Rackspace server host Jupyter Notebooks from your github repo
TextSTAT - TextSTAT is a simple programme for the analysis of texts.
Jupyter - Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.