Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Personal Finance & Money
Q&A for people who want to be financially literate
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Ask Different
Q&A for power users of Apple hardware and software
Server Fault
Q&A for professional system and network administrators
Physics
Q&A for active researchers, academics and students of physics
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Game Development
Q&A for professional and independent game developers
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Reverse Engineering
Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation
Computational Science
Q&A for scientists using computers to solve scientific problems
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Quantitative Finance
Q&A for finance professionals and academics