ResearchGPT
ResearchGPT is an open-source research assistant that allows users to have a conversation with a research paper or any PDF, with added functionality to use your own API key and a demo available online
Free 
Rank: #89 
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Free Rank: #89 Visits: 
Aistote
Aistote is a learning platform designed to facilitate studying for students, professionals, and knowledge enthusiasts, offering question and flashcard generation based on course content for flexible study opportunities.
Freemium Rank: #90 Visits: