Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Academia
Q&A for academics and those enrolled in higher education
Computational Science
Q&A for scientists using computers to solve scientific problems
Quantitative Finance
Q&A for finance professionals and academics
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Computer Science
Q&A for students, researchers and practitioners of computer science
