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for the Stack Exchange family of free, community-driven Q&A websites
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Project Management Stack Exchange

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Tor Stack Exchange
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Personal Finance & Money Stack Exchange
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Blender Stack Exchange

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3D Printing Stack Exchange
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Android Enthusiasts Stack Exchange
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Arduino Stack Exchange
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Augur Stack Exchange
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Aviation Stack Exchange
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Board & Card Games Stack Exchange
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Cryptography Stack Exchange
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Data Science Stack Exchange
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Drupal Answers

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ExpressionEngine® Answers, Q&A for administrators, end users

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Physical Fitness Stack Exchange
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Mi Yodeya
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Lifehacks Stack Exchange

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Linguistics Stack Exchange
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Literature Stack Exchange
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Magento Stack Exchange
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Martial Arts Stack Exchange

for those involved in the field of teaching mathematics
Mathematics Educators Stack Exchange
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Mathematica Stack Exchange
for professional mathematicians
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Motor Vehicle Maintenance & Repair Stack Exchange

for developers and users of the secure, private and untraceable cryptocurrency Monero
Monero Stack Exchange
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Movies & TV Stack Exchange
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Music: Practice & Theory Stack Exchange
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Music Fans Stack Exchange

for network engineers
Network Engineering Stack Exchange
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The Great Outdoors Stack Exchange
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Parenting Stack Exchange
for people interested in improving the patent system
Ask Patents

for those interested in the study of the fundamental nature of knowledge, reality, and existence
Philosophy Stack Exchange
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Poker Stack Exchange
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Politics Stack Exchange
for those who create, solve, and study puzzles
Puzzling Stack Exchange

for finance professionals and academics
Quantitative Finance Stack Exchange
for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation
Reverse Engineering Stack Exchange
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Robotics Stack Exchange
for Salesforce administrators, implementation experts, developers and anybody in-between
Salesforce Stack Exchange

for scientists using computers to solve scientific problems
Computational Science Stack Exchange
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SharePoint Stack Exchange
for developers and end users of the Sitecore CMS and multichannel marketing software
Sitecore Stack Exchange
for scientific skepticism
Skeptics Stack Exchange

for people seeking specific software recommendations
Software Recommendations Stack Exchange
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Sound Design Stack Exchange
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Sports Stack Exchange
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Software Quality Assurance & Testing Stack Exchange

for apps, scripts, and development with the Stack Exchange API
Stack Apps
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Cross Validated
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Sustainable Living Stack Exchange
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Travel Stack Exchange

for Tridion developers and administrators
Tridion Stack Exchange
for those committed to a vegan or vegetarian lifestyle and anyone interested in learning more
Vegetarianism Stack Exchange
for engineers, producers, editors and enthusiasts spanning the fields of video and media creation
Video Production Stack Exchange
for enthusiasts and power users of Windows Phone OS
Windows Phone Stack Exchange

for professional and amateur woodworkers
Woodworking Stack Exchange
for WordPress developers and administrators
WordPress Development Stack Exchange
for members of the workforce navigating the professional setting
The Workplace Stack Exchange
for authors, editors, reviewers, professional writers, and aspiring writers
Writers Stack Exchange