Academia
Q&A for academics and those enrolled in higher education
Stack Overflow
Q&A for professional and enthusiast programmers
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
German Language
Q&A for speakers of German wanting to discuss the finer points of the language and translation
French Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Code Review
Q&A for peer programmer code reviews
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Open Source
Q&A for people organizing, marketing or licensing open source development projects
Engineering
Q&A for professionals and students of engineering
Expatriates
Q&A for people living abroad on a long-term basis
English Language Learners
Q&A for speakers of other languages learning English
Stack Overflow en español
Preguntas y respuestas para programadores y profesionales de la informática
Politics
Q&A for people interested in governments, policies, and political processes
Language Learning
Q&A for students, teachers, polyglots, and anyone interested in the techniques of second-language acquisition