Mathematics
Q&A for people studying math at any level and professionals in related fields
Biology
Q&A for biology researchers, academics, and students
Coffee
Q&A for people interested in all aspects of producing and consuming coffee
Chemistry
Q&A for scientists, academics, teachers, and students in the field of chemistry
Physics
Q&A for active researchers, academics and students of physics
Mathematica
Q&A for users of Wolfram Mathematica
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
Chinese Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Personal Finance & Money
Q&A for people who want to be financially literate
Russian Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Russian language
Music Fans
Q&A for music historians, critics, and fans