Bootstrap registration forms are easy to use and responsive. I have collected top 6 bootstrap 2 and bootstrap 3 responsive registration forms here:
1) Authenty Login And Signup Bootstrap Forms : (DEMO | DOWNLOAD)
Bootstrap 3 all-in-one authentication web forms designed in various styles for your mix & match.
2) Responsive Tabs Control & Tabbed Bootstrap Registration Form : ( Demo | Download)
Responsive three themes included with Light, Black, Grey colors form, also works as a modal popup.
3) Eternity Bootstrap 3 Registration Form : (DEMO | DOWNLOAD)
Dark And Light Themes Available,Flat Style Forms,350+ icons,Retina Ready
4) Typica Login Bootstrap Form : (DEMO | DOWNLOAD)
Typical Bootstrap registration form.
5) Sleek-kit Clean & Simple Bootstrap Form: (DEMO | DOWNLOAD)
Sleek-kit Clean and Simple Form HTML & CSS. Its well commented mark-up, W3C Validate mark up and Easy to use.All major Browser Supported.Its Bootstrap Grid form pack. Sleek kit is simple, clean and fresh modern form pack hat useful to agency, company , portfolio, etc..
6) Bootstrap Modal Log In for WordPress : ( DEMO | DOWNLOAD )
Modal Log-in for WordPress provides you with a beautiful alternative log-in for your WordPress powered website based on the popular Twitter Boostrap, a front-end toolkit for developing web applications. It supports bootstrap 3 as well.