Fenrir Inc., the company behind the Sleipnir for Windows browser, released the iPhone version this past Sunday. Dubbed Sleipnir Mobile, the smallish 1.4MB download contains a fully-featured browser built on top of the WebKit rendering engine, like most other third-party browsers on Apple’s phone. But it’s the new features and interesting design choices that’ll make you wanna load this app onto your device.

For starters, Sleipnir’s smooth tabbed browsing implementation lets you switch between open tabs by flicking through their thumbnail images laid out on a filmstrip at the screen bottom. In fact, this translucent filmstrip can take the entire screen height, allowing you to organize your tabs into scrollable rows, seen in a pair of images below.

User interface is fluid and designed to take advantage of some new gestures, in addition to the familiar pinch zoom and swipe gestures. Wanna kill a tab? Just flick it down to close. Double tap to protect a tab from accidental closing. You can also open pages in the background by holding down a link. You can touch and hold links, bookmarks, and searches to open in new tabs while viewing a page.

And unlike Safari, Sleipnir lets you label bookmarks and it even syncs your bookmarks with the cloud. The browser’s search bar provides a one-tap access to popular search engines like Google, Yahoo, Bing, Amazon, eBay, Wikipedia, Google Images, and Google Realtime. Finally, heavy mobile users will appreciate a full screen mode in landscape that hides all the controls in order to maximize screen real estate for web content.

If you’ve been looking for ways to take your mobile browsing experience to the next level and beyond Apple’s Safari browser and Opera for iPhone isn’t your cup of tea, you should really consider Sleipnir’s tabbed browsing capabilities and other interesting enhancements it brings to the table.

Go ahead and grab the free download now or check out Fenrir’s demo video below.