Internet Dereams is a clean, user friendly and attractive Admin template that would fit in perfectly as the backend for most web applications. Included in the template are the login screens, the dashboard, form elements and table layout screens. The PSD is also available.
Choc-full of nice effects and customizations, INADMIN is a fantastic solution for your web application. Here are some of its unique features: Digital and Analog clock, dropdown menu, jQuery sidebar accordion menu and some original form styling.
Adminizio Lite is a well-designed template with a strong emphasis on usability and clarity. Its main features include: Tested across all major browsers, well commented coded (always appreciated) and its universal set of CSS styles has been used for titles, tables, lists, forms and system messages.
The My Ecommerce Admin Template is a 3 column design with a tabbed menu. The idea is having the standard categories in the tab menu for easy reach and have all the detailed ones in the left menu. And there is also a useful info box at the right of the template to inform users what’s going on on at that page.
Spring Time is a simple and professional interface for your custom web application and does include the PSD within the download package.
Transdmin Light is a minimal template that could be used for a basic web application. PSD is also available.
Web App Theme is a powerful rails generator by Andrea Franz that you can use to generate admin panels quickly. It has been inspired by cool web apps like Lighthouse, Basecamp, RadiantCMS and others.
Inspired by the BBC homepage, Steal My Admin features a dashboard with movable blocks that allow the user to customize the website to their liking, and clean and smooth user friendly forms and tables.
Robert Jan Dreu has also made a jQuery port of this theme, you can download it here: jQuery Admin Template ?
Chocotemplates.com has created two basic admin templates you could freely use. The PSD is also included in both downloads.