Character.AI
Chat with millions of AI characters or create your own; huge community and web/app access.
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Civitai
Community hub for sharing generative image/video models and LoRAs (Stable Diffusion, Flux, etc.).
JannyAI (formerly JanitorAI)
Large roleplay platform with extensive character catalog and user-created bots.
Kaggle Datasets
Community-driven repository of datasets with notebooks, discussions, and trending signals.