LLMChat.me is an online service that aggregates dozens of open-source large language models into a unified chat interface. Users can select from models such as Vicuna, Alpaca, ChatGLM, and MOSS to generate text, code, or creative content. The platform stores conversation history, supports custom system prompts, and allows seamless switching between different model backends. Ideal for experimentation, prototyping, and productivity, LLMChat.me runs entirely in the browser without downloads, offering fast, secure, and free access to leading community-driven AI models.

PubChem is an open chemistry database maintained by the National Institutes of Health (NIH). It provides free access to information on chemical substances, their structures, and biological activities. Researchers, educators, and the general public can search by chemical names, molecular formulas, structures, and more. PubChem aggregates this data from various contributors, making it a valuable resource for professionals in biomedical research and chemistry. It also promotes data sharing and collaboration among scientific communities.