Web Worker Daily lists seven browser-testing services that test how your web pages render on a range of different browsers. These services allow you to do the coding and farm out the testing work. The services:

1) Remove the need to install multiple browsers on your own computer for testing purposes.
2) Remove the frustration of testing across Windows, Mac, Linux, and with multiple versions.
3) Remove the time consuming task of checking of updating to the latest browsers versions and retesting.

IE NetRenderer will show your page in IE 5.5, 6, or 7, to give Mac and Linux-based designers a quick sanity check. It’s free and quick.

BrowsrCamp is designed to show off how your page looks under the various Mac browser out there. You can view Safari screenshots for free, or take VNC control of a live Mac loaded with 11 different browser for prices starting at $3 for 2 days.

Browsershots offers screen captures of your site under dozens of different Linux, Mac, and Windows browsers. The paid option of $15 per month provides priority processing for your requests.

BrowserCam offers an online interface for managing screenshots across a variety of recent browsers and operating systems including Linux, Mac, and Windows. You can get a 24-hour free trial; after that, plans range from $19.95 for one-day access to $399.95 for a full year. Offers Device Capture service that will do screenshots of your site on Blackberry and Windows Mobile devices.

Litmus covers a variety of Windows browser, from IE 5.0 up to the alpha of Firefox 3. Results are returned via screenshots. They also integrate bug tracking, version management, and private URLs you can use to share compatibility results with clients. These features come at a price after the initial 30-day trial: 39 euros monthly for an individual account, or 129 euros monthly for a team account.

Browser Photo comes from Keynote NetMechanic. They promise screenshots from Windows, Mac and Linux systems for a $15 one-time fee or $150 per year, but don’t offer any details on which browsers or versions they cover in advance of sign-up, or any trial program.

BrowserPool takes the VNC approach to provide access to Mac, Windows, and Linux systems. Their pricing starts at 29.99 euros for one month, but unfortunately their software versions are a bit out of date.