stackCodeExpander is a free Chrome add-on developed by malko. It falls under the category of Browsers, specifically Add-ons & Tools. This program allows users to expand code samples in StackOverflow comments and GitHub.

With stackCodeExpander, users can easily view code samples in a larger, more readable format. A small button is added to the top left corner of any code sample in StackOverflow, or a file view in GitHub, which expands the code to full window size. Alternatively, users can simply double-click on a code sample to make it full window size. To exit full window size mode, users can press the escape key.

The latest version of stackCodeExpanderincludes better support for GitHub, as well as auto-resizing when the window is resized. Additionally, the expand button has been moved to the right for better accessibility.

Overall, stackCodeExpander is a useful tool for developers who frequently visit StackOverflow and GitHub, providing a convenient way to view code samples in a more comfortable and immersive manner.