Hugging Face Chat offers free access to hundreds of open-source AI models for text, code, image, and multimodal interactions in a collaborative community hub used by millions worldwide.

ChatPDF is a free AI tool that lets users upload PDFs to ask questions, get summaries, extract information, and gain insights from documents quickly and securely worldwide.

DeepSeek Chat provides free access to advanced open models like DeepSeek-V3 and Coder for superior reasoning, mathematics, coding, and long-context conversations globally.

Blackbox AI is a free coding assistant that helps generate, debug, optimize, and explain code in any programming language with real-time suggestions for developers globally.

NotebookLM by Google is a free experimental AI tool that transforms uploaded documents, notes, and sources into audio overviews, summaries, study guides, and interactive insights instantly.

QuillBot is a free multifunctional AI writing assistant offering paraphrasing, summarizing, grammar checking, citation generation, and translation with high daily limits for global users.