I've been working lately on a jQuery plugin for measuring passwords strength. It uses Bootstrap components for the visual feedback, it works with Bootstrap 2 and 3.
It is highly configurable, you can adapt the plugin to your necessities. You can add new rules to the engine or change the scores of the existing ones, you can even use zxcvbn to calculate the password entropy instead of the plugin own rules engine. You can also configure the UI, choose which information do you want to appear, and where.
Everything you need to start using it is on the repository. Enjoy!