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Personally used, very affordable. Requires a VPN for access.

The leading generative AI chatbot developed by OpenAI.

A powerful multimodal AI model launched by Google.

An AI assistant from Anthropic, skilled in long-text processing.

A conversational AI with search, providing sources for reliable answers.

An AI platform focused on AI search and large language models.

An AI assistant from ByteDance, offering chat, writing, and Q&A services.

An AI assistant from Moonshot AI, supporting long-text reading and smart Q&A.

Elon Musk's AI company and its conversational AI, Grok.

An AI platform that integrates multiple chatbots like ChatGPT and Claude.

Updates and information for the Z-Library digital collection.

The world's largest search engine and the primary gateway to information.

The world's largest video-sharing site with vast educational and entertainment content.

A highly-rated online translator known for its accurate and natural-sounding translations.

A biomedical literature database provided by the U.S. National Institutes of Health (NIH).

A free academic search engine from Google, essential for research.

A powerful tool for accessing full-text academic papers.

A global database of clinical trial registrations and results from the NIH.

A professional life sciences illustration tool for creating publication-quality diagrams.

A code hosting and collaboration platform for developers.

A web archiving service from the Internet Archive that lets you view past versions of websites.

A free online tool to unlock PDF files by removing passwords and restrictions.

A guide on how to perform plagiarism and similarity checks for academic papers.

A content editor for WeChat Official Accounts.

A service that provides geolocation and detailed information for IP addresses.

One of the world's largest digital libraries, offering millions of e-books for download.

A Chinese journal service platform from Wanfang Data for academic paper retrieval.

The main database navigation for China National Knowledge Infrastructure (CNKI).

A professional drug reference and clinical decision support tool from DXY.

The official website of China's National Medical Products Administration.

A powerful equation recognition tool that converts images of math equations to LaTeX.

An all-in-one online PDF tool for compressing, converting, merging, and more.

An online tool for downloading videos and audio from YouTube.

Chinese Clinical Trial Registry, a primary registry in the WHO Registry Network.

A KMS tool for activating Windows and Office (GitHub release page).

ICANN's official domain information (WHOIS) lookup tool.

An online tool to convert text into Xiaohongshu note format with auto-emojis.

The gold standard clinical practice guidelines in oncology from NCCN.

A powerful tool for viewing, editing, and managing PDFs (Mac version).

A powerful and versatile file compression software (Mac version).

A powerful screen capture, recording, and annotation tool for Mac.

A fast file and content search tool for Mac.

The classic, comprehensive reference management software (Mac version).

A powerful, open-source video player for Mac.

Microsoft's official office suite, including Word, Excel, PowerPoint (Mac version).

An intelligent clipboard history management tool for Mac.

Software for biostatistics, curve fitting, and scientific graphing (Mac version).

Powerful statistical analysis software for academic and social sciences (Mac version).

An excellent and popular VPN client for macOS.

A powerful tool for viewing, editing, and managing PDFs (Windows version).

The classic, comprehensive reference management software (Windows version).

Software for biostatistics, curve fitting, and scientific graphing (Windows version).

Professional statistical software for sample size and power calculation (Windows version).

Powerful statistical analysis software for academic and social sciences (Windows version).

An excellent and mainstream VPN client for Windows with powerful features.

A detailed guide on how to configure and use proxies to access the global internet.

Sharing advanced Google search techniques to help you find information faster and more accurately.

Tutorials and tips for installing and using common research software.

Read more articles on research, technology, and learning.

The world's largest search engine

The world's largest video sharing site

The world's leading social network

A social app for sharing photos and videos

A global microblogging and social network

China's largest Chinese search engine

A free, open, multilingual online encyclopedia

A famous American web portal and search engine

Russia's largest search engine

A globally popular instant messaging app

The world's largest e-commerce company

A short video social platform by ByteDance

A free personal email service from Microsoft

AI research lab, developer of ChatGPT

A community for social news and discussion

A professional social networking service

A web search engine from Microsoft

A comprehensive portal by Tencent

A voice, video, and text chat app for communities

The online version of Microsoft's Office suite

The world's leading live streaming platform for gamers

South Korea's largest search engine and portal

An authoritative site for global weather forecasts

A cultural community and video platform for China's youth

A leading global software, services, and devices company

A massive multiplayer online game creation platform

A search engine that emphasizes privacy

A social platform for sharing images and finding inspiration

A platform for video conferencing and online collaboration

An instant messaging app focused on speed and security

The world's leading streaming entertainment service

A global online auction and shopping site

An easy-to-use online graphic design tool

A major American retail chain and e-commerce platform

A major Russian email service provider

A web portal from Microsoft providing news and information

Russia's largest social networking service

The world's leading music streaming service

A South Korean multinational electronics company

A popular open-source blogging and content management system

A modern JavaScript tutorial and learning resource

A globally renowned technology company

A question and answer community for programmers

A leading provider of digital media and online marketing solutions

A code hosting and collaboration platform for developers

An online Q&A community to share and acquire knowledge

A global online payments and money transfer service

A fan-driven wiki and community platform for entertainment

Brazil's largest media group and web portal

An influential American newspaper

An online database for movies, TV, and celebrity content

An online retail platform from Alibaba for global markets

An online marketplace for handmade and vintage items

A global search engine for job listings

A major media outlet for sports news, live events, and scores

A leading global platform for online hotel and accommodation booking

The world's leading public service broadcaster

A platform offering cloud storage and file synchronization services

An online publishing platform with articles and stories on various topics