Hearts XT is described as 'A fresh take on Hearts: Easy and intuitive to play! Enjoy the popular card game with smart computer opponents or with friends and others online. Choose from a variety of beautiful backgrounds and configure the game the way you like to play'. There are three alternatives to Hearts XT for a variety of platforms, including Android, Online / Web-based, Self-Hosted solutions, Apple TV and Windows. The best alternative is Zchr Hearts, which is both free and Open Source. Other great apps like Hearts XT are Hardwood Hearts (Freemium) and King Of Hearts Card Game (Free).
Play Hearts online with friends right through your browser. No registration, nothing to install. Just visit the website and get a url to share with your friends or family so they can join you. Play online for free or download the source code and host it yourself.