Question: Do you know of a tool that allows me to take notes and organize information from complex documents, with source material, for later reference?

If you want a tool to take notes and process information from dense documents, Layer is a good choice. It uses AI to do some of the legwork for you, with features like Instant Extraction, Precise Answers and a Notebook where you can store relevant information along with its source. That could be useful for researchers, journalists and scientists who need to get a lot done and make good decisions.

Another good option is Unriddle, which builds an AI assistant on top of any document. It can answer questions immediately, summarize complex subjects, take notes and write text. Unriddle also can spotlight related sources, generate interactive graphs and work in more than 90 languages. That could be good for researchers like PhD students and R&D scientists who need to quickly process and extract information.

If you specifically need to understand PDFs, ChatPDF is an AI-powered tool. You can upload a PDF and ask questions, and the tool will respond with answers and summaries with citations. That could be useful for students, researchers and others who have to deal with academic papers, legal contracts and other documents. It works in multiple languages and can handle large documents.

Last, Reflect marries AI with powerful note-taking abilities. It can transcribe voice notes, summarize articles and check grammar. Reflect also lets you link notes with backlinks and import web clips across devices. It's good for anyone who wants an organized, secure and efficient way to take notes.