Looking to make your web design process faster? These sets of PSD and vectors of UI elements should help you.

1. jQuery UI widgets

jQuery must be the most popular javascript framework out there, this set of UI widget will make the development process much quicker.

2. Modern Web UI Set

A well-organized PSD, with vector layers you can edit to blend perfectly in your web design or application.

3. Web UI & Button Set

A set of clean UI and buttons in three different styles with over seven colors. Control buttons, text and info boxes, navigation buttons and elements, search forms,… all you need is there.

4. Mobility: set of mobile UI elements

A PSD file containing UI elements to help speed the customization of your mobile web application designs.

5. iPhone GUI PSD

Looking to design for the iPhone? This set should be quite handy.

6. Free iPhone toolbar icons

Another one for the iPhone, a cool set of icons for the iPhone toolbar.

7. iPhone UI Vector Elements

Another UI set for the iPhone, in vector format this time.

8. Android GUI PSD Vector Kit

Because not everybody had an iPhone, the UI elements kit for Android could reveal itself quite useful.

9. Yahoo Stencil Kit

A cool resource offered by Yahoo. It contains, among other things: ad units, calendars, carousels, UI controls, grids, form elements,…

10. WooFunction web design icons

Gorgeous icons to use in your web designs of web applications. Probably the classiest icons for web design out there.

11. Web designer mini kit

Not so many items in the kit, but the right ones: credit cards icons, buttons,…

12. Vector Web Assets Pack

Offered by VectorTuts, this web assets pack contains browser screens and website elements.

13. PSD iPad GUI Kit

Graphical elements for the iPad in vector format, offered with a canvas size true to the iPad at 768×1024 px.

14. Music Player UI PSD

If you need a music player, you can start creating it by playing with this Music Player UI PSD.

15. Browser Form Elements PSD

I hate working with forms, I find it just painful. This set of browser form elements PSD should make it a bit easier to visually customize your forms.

16. Blue Modern Web UI

A simple, glossy set of blue icons, very web 2.0 style.

17. OmniGraffle Wireframe Stencils

A very complete set of shapes for making wireframes.

18. Flex 3 Stencil

Includes all Flex components from Flex 3 Style Guide: panels, data grid, buttons, fields, links, toggle, menu, scrolls, accordion, tabs, list, data picker, and more…