There are several free web development courses available online that cover HTML and CSS programming languages. Here are a few popular options:

1. MDN Web Docs: Mozilla Developer Network (MDN) offers a comprehensive set of tutorials and guides for HTML and CSS. They cover everything from basic concepts to advanced topics. You can find their HTML tutorial here: https://developer.mozilla.org/en-US/docs/Learn/HTML and their CSS tutorial here: https://developer.mozilla.org/en-US/docs/Learn/CSS.

1. FreeCodeCamp: FreeCodeCamp is a well-known platform that offers a full curriculum for web development. Their curriculum includes an HTML and HTML5 section as well as a CSS section. You can access their curriculum for free and work through their interactive coding challenges. Visit their website at https://www.freecodecamp.org/.

1. W3Schools: W3Schools is an online resource for learning web development technologies. They have extensive documentation and tutorials on HTML and CSS, covering all the necessary concepts. You can find their HTML tutorial here: https://www.w3schools.com/html/ and their CSS tutorial here: https://www.w3schools.com/css/.

1. Codecademy: Codecademy offers interactive courses for various programming languages, including HTML and CSS. While some of their content requires a subscription, they also provide free access to their introductory web development courses. You can get started with their HTML course here: https://www.codecademy.com/learn/learn-html and their CSS course here: https://www.codecademy.com/learn/learn-css.

These resources should provide you with a solid foundation in HTML and CSS programming languages. Remember to practice and apply what you learn by building your own projects and experimenting with different code examples.