Liveapplet - ((free))

The primary selling point of LiveApplet is its compatibility. When Google Chrome and other major browsers removed NPAPI support (killing Java Applets), a massive chunk of internet history disappeared overnight. Interactive chemistry simulations, old arcade games, and physics demos became inaccessible.

: For features like "search-as-you-type," use debouncing to delay sending events to the server until the user stops typing for a few hundred milliseconds. This prevents overloading the WebSocket channel. liveapplet

Used by 500+ teams – from indie hackers to Fortune 500s. The primary selling point of LiveApplet is its compatibility

These applets allowed web pages to perform complex tasks, like accessing local .NET DLLs for specialized industrial hardware. The Transition: old arcade games

No WebSocket servers, no Redis pub/sub, no CDN configuration. Just business logic.