Charstar is a virtual character foundation based on open-source AI technology that offers a broad range of characters, each with its own personality, history and abilities. You can have a lot of depth and nuance in your conversations, which makes it a good option for people who like interactive fiction or role-playing.
Another good option is Saga, an AI-powered text-based role-playing game that combines the style of old-school RPGs with modern technology. It has customizable settings, conversational dialogue with AI-powered characters, and a community forum where you can discuss ideas and plot with other players.
Last, Cypher is a conversational AI foundation that lets you create and interact with your own realistic characters in real time using generative models. It supports a range of features like text-to-speech, voice recognition and image generation, so it's good for active communities and people who want a more immersive connection.