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General chat for Physics SE (https://physics.stackexchange.com/). For MathJax see https://meta.stackexchange.com/a/220976. Don't ask about asking, just ask. For further guidelines see https://physics.meta.stackexchange.com/a/11094.
Discussions about VBA, the VBE, C#, COM interop and Rubberduck. Also, where Stack Overflow questions become Rubberduck inspection ideas. http://www.rubberduckvba.com | http://www.github.com/rubberduck-vba/Rubberduck
Where diamonds are made, smoke is detected, and we break things by developing on production. 150k true positives and counting. For more information, see https://charcoal-se.org/about. Handy links: https://metasmoke.erwaysoftware.com, https://github.com/Charcoal-SE
General Arqade chat, wherein we're all just confused. Especially Dragonrage.
To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be. http://engineering.stackexchange.com
A meeting place for sponsors and excellent posts. See https://math.meta.stackexchange.com/q/31105/11619
General discussion for http://unix.stackexchange.com. If you have a question, see http://unix.stackexchange.com/questions/ask
Chat de la comunidad de Stackoverflow en español. A veces charlamos sobre temas de programación, discutimos preguntas y/o respuestas, hablamos de tecnología y otras cosas. Habla, convive, conversa, responde, pregunta, pero siempre desde el respeto. https://es.stackoverflow.com
Associated with Math.SE; for both general discussion & math questions alike. Just ask; don't ask to ask. Rarely if ever expressible as a ratio of integers. Chat guidelines: http://tinyurl.com/hzl2955 | $\LaTeX$ in chat: http://tinyurl.com/cfqcvpc
Game development and other polite discussion. Game development conversations have priority. Please star responsibly. Be Nice applies here: https://gamedev.stackexchange.com/help/be-nice
Welcome! This is the main Mathematica chat room for http://mathematica.stackexchange.com/. Other than the general guidelines (http://chat.stackexchange.com/faq) in place, anything goes here. Feel free to discuss most things.
Where you strongly feel realism with your various hand postures
General discussion for http://pets.stackexchange.com. Pet pictures and gifs welcome. Oneboxes are awesome! For anything that's not related to pets or disrupts the flow, please use https://chat.stackexchange.com/rooms/79660/pets-chat-off-the-leash instead
General discussion about http://codereview.stackexchange.com/ - Welcome to The 2nd Monitor! http://codereview.meta.stackexchange.com/questions/5967/welcome-to-the-2nd-monitor - Site Business always comes first