Mathematica
Q&A for users of Wolfram Mathematica
Physics
Q&A for active researchers, academics and students of physics
Mathematics
Q&A for people studying math at any level and professionals in related fields
MathOverflow
Q&A for professional mathematicians
Stack Overflow
Q&A for professional and enthusiast programmers
Seasoned Advice
Q&A for professional and amateur chefs
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Law
Q&A for legal professionals, students, and others with experience or interest in law
Academia
Q&A for academics and those enrolled in higher education
Chemistry
Q&A for scientists, academics, teachers, and students in the field of chemistry
Biology
Q&A for biology researchers, academics, and students
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Computational Science
Q&A for scientists using computers to solve scientific problems
Personal Finance & Money
Q&A for people who want to be financially literate
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Economics
Q&A for those who study, teach, research and apply economics and econometrics
French Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language