Software Engineer, interests in Machine Learning and Computational Statistics
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Mathematics
Q&A for people studying math at any level and professionals in related fields
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Computational Science
Q&A for scientists using computers to solve scientific problems
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Server Fault
Q&A for professional system and network administrators
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Photography
Q&A for professional, enthusiast and amateur photographers
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites