Discord has developed a new client called Discord Messenger, which allows users on legacy systems such as Windows XP, Windows 95, and NT 3.1 to access the platform. This project utilizes the Discord API as a web application, enabling third-party client development without repercussions from Discord. The developers overcame challenges related to TLS encryption compatibility and crafted shims for API calls absent in older systems. They also addressed runtime issues on Windows NT 3.1 by backporting features from the original operating system.