Twitter's internationalization (i18n) and localization (l10n) model doesn't follow traditional methods. Instead of contracting out to professional translators, Twitter maintains an active community of over 500,000 volunteers who have helped successfully launch Twitter in 28 la...

We all love Rails, and lots of us love ActiveRecord. It's intuitive and easy to use in small apps that don't have lots of models. You can select, join, and where your way into a great, working app in no time. Then your app starts to grow, you add more models, and you need to s...