Exolve, Exet, and Gussalufz
Free open source software (MIT License) for setting up interactively solvable crosswords as HTML files (that work in any modern browser and device) with the crossword specified in a simple plain-text format. I have developed this software and I actively maintain it. The link takes you to the Exolve GitHub project that includes a detailed README file with instructions.
A simple Exolve-based web-app that can open Exolve/ipuz/puz files. The link is to my own hosted version (no data is sent to it). You can also run your own, using the exolve-player.html file in the Exolve repo.
Free open source software (MIT License) for constructing crosswords. You can save the crosswords as Exolve files as well as .puz files. I have developed this software and I actively maintain it. You can directly start using the web app link given above, or you can access the Exet GitHub project for the source code and documentation.
A collection of my crossword puzzles (most interactively solvable, powered by Exolve).
I'm Viresh Ratnakar, a cryptic crossword enthusiast and a setter for the Hindu Cryptic. Other interests: Books. Running. Cooking. Eating. Writing. Coding. Movies. TV. Cricket on TV. Red wine. Beer. Scotch. Dogs. I get along best with dogs.
Contact: @vireshratnakar on Twitter. Or, via email at viresh at gmail d0t com.