- Regex for ruby: http://www.rubular.com/
- strftime: http://strfti.me/
- css gradient generator: http://www.colorzilla.com/gradient-editor/
- css validator: http://jigsaw.w3.org/css-validator/
- css rounder corner generator: http://a.deveria.com/roundgen/
- 7 great js resources (not really a tool but useful): http://mashable.com/2011/07/03/7-great-javascript-resources
will be updated as i found another tools
