Stack Overflow
Q&A for professional and enthusiast programmers
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Vi and Vim
Q&A for people using the vi and Vim families of text editors
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Mathematics
Q&A for people studying math at any level and professionals in related fields
Web Applications
Q&A for power users of web applications
Anime & Manga
Q&A for anime and manga fans
Computer Science
Q&A for students, researchers and practitioners of computer science
Super User
Q&A for computer enthusiasts and power users
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Blender
Q&A for people who use Blender to create 3D graphics, animations, or games
Academia
Q&A for academics and those enrolled in higher education
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Server Fault
Q&A for system and network administrators
Ask Ubuntu
Q&A for Ubuntu users and developers
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
Code Review
Q&A for peer programmer code reviews
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Artificial Intelligence
Q&A for people interested in conceptual questions about life and challenges in a world where "cognitive" functions can be mimicked in purely digital environment
Hardware Recommendations
Q&A for people seeking specific hardware recommendations