Stack Overflow
Q&A for professional and enthusiast programmers
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Poker
Q&A for serious players and enthusiasts of poker
Hardware Recommendations
Q&A for people seeking specific hardware recommendations
Bitcoin
Q&A for Bitcoin users, developers, and enthusiasts
The Workplace
Q&A for members of the workforce navigating the professional setting
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Law
Q&A for legal professionals, students, and others with experience or interest in law
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Open Source
Q&A for people organizing, marketing or licensing open source development projects
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Information Security
Q&A for information security professionals
Server Fault
Q&A for system and network administrators
Super User
Q&A for computer enthusiasts and power users
Ask Different
Q&A for power users of Apple hardware and software
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
User Experience
Q&A for user experience researchers and experts
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Sound Design
Q&A for sound engineers, producers, editors, and enthusiasts
Open Data
Q&A for developers and researchers interested in open data