What best plugins for web development?

Answer 1

1. PNGExpress - makes slicing multiple assets a breeze!
http://www.pngexpress.com/

2. CSS Hat - generates CSS / SCSS / SASS from Photoshop layer styles!
http://csshat.com/

3. Pixel Dropr - create, share and organize your assets in a wonderful way. I have found a few exotic creative uses myself and would be lost without this extension.
http://www.pixeldropr.com/

4. Photoshop Actions & Workflows by bjango - needs no introduction. A must have actions pack for Photoshop!
https://bjango.com/articles/actions/

5. 12 New Photoshop Tools by Diego Monzon - a wonderful freebie extension that allows you to perform otherwise tedious tasks with a click of a button.
http://www.dmonzon.com/12-photoshop-tools/

Answer 2

jQuery