eLua Project - Sputnik Earth, custom template.

World of Warcraft Programming — Sputnik Earth with substantial modifications, including addition of forums, WYWIWYG editor.

Electron Meat — Sputnik "Dish of the Day", custom style.

• LuaRocks Sputnik "Earth", minor customization of templates, custom markup syntax.

Kepler Project — Sputnik "Earth" with almost no customization.

takhteyev.org — Sputnik "Earth" running from git, custom template.

Other Sites

• Net-Core/Tethys (Dish of the Day?)
• Sputnik (most recent version from git)
• Python Markdown ("Earth" from git)

If you have or know of a public site using Sputnik please add it to this list. (It doesn't need to be publicly editable but it should be intended for public viewing.)