Sleipnir is a popular Japanese web browser that allows you to switch between Trident (Internet Explorer) and WebKit browser engines. It can automatically remember your choice of engine for each website, which makes switching engines completely transparent.Sleipnir is highly customizable and offers an integrated RSS feed reader that lets you read and manage news feed from inside a browser tab.A unique page flicking feature allows you to quickly cycle through your open tabs by holding down the right mouse button and "flicking" the page to the left or right (similar to swiping on your iPhone). You can quickly scroll pages up/down in the same manner.Sleipnir also offers optional integration with an online service that enables you to share web content with via Facebook, Twitter (etc.) and link content with your Android or iPhone device.When it comes to browser extensions, Sleipnir disappoints - there are only a handful of add-ons available.