If you happen to buy or sell on eBay frequently, the Lauge custom browser is an interesting tool you'll want to check out.

Lauge sports a ton of functionality that makes using eBay less bothersome. The search tab provides a handy tree view of all eBay categories and makes navigation around the site a snap; favorite your go-to categories to access them quickly later. It also includes a simple keyword search and seller search with results filtering options.

Once you've selected a category to browse, Lauge activates the gallery view which provides a thumbnailed view of all eBay gallery items. It's a great visual tool for separating the wheat from the chaff in a hurry. Item listings can be sorted in the same ways as on eBay's site, and you can fully customize which columns you'd like displayed in the results pane. Some options, like item condition (which would be truly useful) don't yet display, though that may have more to do with sellers not specifying it in the first place.

Lauge also handles tabbed browsing, making it easy to switch back and forth between items or categories. On the downside, the panes aren't resizable which can make the item view a bit cramped. Clicking the orange "eject" button will open a full screen view that remedies the situation and lets you view the item in detail as you would on eBay.

Lauge supports English and German, and requires the MSXML 4 download.