I'm not active much anymore here at English.SE, as it has been too addictive for me. Lots of fun, lots of good stuff here, but I need to spend that time elsewhere.
Thanks for visiting the English Stack Exchange site!
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Chemistry
Q&A for scientists, academics, teachers and students
Sports
Q&A for participants in team and individual sport activities
Biology
Q&A for biology researchers, academics, and students
Physics
Q&A for active researchers, academics and students of physics
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts
Stack Overflow
Q&A for professional and enthusiast programmers
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Ask Different
Q&A for power users of Apple hardware and software
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Server Fault
Q&A for professional system and network administrators
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Game Development
Q&A for professional and independent game developers
Mi Yodeya
Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more
Photography
Q&A for professional, enthusiast and amateur photographers
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
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
User Experience
Q&A for user experience researchers and experts
Martial Arts
Q&A for students and teachers of all martial arts
Academia
Q&A for academics and those enrolled in higher education
The Great Outdoors
Q&A for people who love outdoor activities, excursions, and outdoorsmanship
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Libraries & Information Science
Q&A for librarians and library professionals
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Islam
Q&A for Muslims, experts in Islam, and those interested in learning more about Islam
Ask Patents
Q&A for people interested in improving and participating in the patent system
Russian Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Russian language
The Workplace
Q&A for members of the workforce navigating the professional setting
Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Spanish Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Spanish language
Computational Science
Q&A for scientists using computers to solve scientific problems
French Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Personal Finance & Money
Q&A for people who want to be financially literate
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Personal Productivity
Q&A for people wanting to improve their personal productivity
Homebrewing
Q&A for dedicated home brewers and serious enthusiasts
German Language & Usage
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Audio-Video Production
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Software Quality Assurance & Testing
Q&A for software quality control experts, automation engineers, and software testers
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Biblical Hermeneutics
Q&A for professors, theologians, and those interested in exegetical analysis of biblical texts
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Quantitative Finance
Q&A for finance professionals and academics