Semanticscholar
Semantic Scholar is a free, AI-powered search and discovery tool that helps researchers discover and understand scientific literature that's most relevant.
Free 
Rank: #2 
Visits: 9.6M 
Free Rank: #2 Visits: 9.6M 
Scite_
Scite.ai is an award-winning platform for discovering and evaluating scientific articles via Smart Citations, trusted by leading universities, publishers, and corporations across the world, with over 650,000 users.
Freemium Rank: #3 Visits: 1.3M 
Interactive Mathematics
IntMath's AI Math Problem Solver offers step-by-step solutions and answers to various math problems, including word problems and equations, through a powerful mathematical computational engine and large language model artificial intelligence
Ask Rank: #5 Visits: 366.1K 
Trinka.ai
Trinka.ai is an AI-powered free online grammar checker and language enhancement writing assistant designed for academic and professional writing, which helps users instantly correct their writing, grammar, spelling errors, and much more, with suggestions for word choice, tone, and more, and it is trusted by academics, copywriters, marketers, product teams, bloggers, and more.
Freemium Rank: #10 Visits: 202.3K 
College Tools
CollegeTools.io is an AI-powered online learning platform that helps students complete their homework in under 5 minutes, integrates with various LMS platforms, and uses GPT-4 for accuracy.
Ask Rank: #16 Visits: 87.7K 
Research Journal Database
ABCD Index is a website that provides a list of true journals indexed in Scopus, Web of Science, UGC Care, and NAAS indexing, as well as offering membership benefits such as reviewer community connection, reviewer and membership certificates, chapter page posting, and conference organizer tools.
Ask Rank: #19 Visits: 59.6K 
DeAP Learning Labs
DeepLearning.AI offers a variety of resources, including a machine learning specialization, to help learners gain a comprehensive understanding of the field and its applications.
Free Rank: #21 Visits: 46.6K 
ghostwrite ai
Ghostwrite is an AI email writing assistant that helps users draft and send emails with ease, saving time and effort.
Free Rank: #23 Visits: 38.3K 
WEVO
WEVO is a next-generation research platform that enables teams to uncover reliable user insights effortlessly and advocates vetting AI-generated content and experiences to ensure appeal to diverse audiences.
Ask Rank: #26 Visits: 33.5K