Semporium is described as 'is your custom home page, showing all the websites you use on the same page just one click away' and is an website in the Online Services category. There are more than 10 alternatives to Semporium, not only websites but also apps for a variety of platforms, including Windows, Mac, Google Chrome and Linux. The best alternative is Diigo, which is free. Other great sites and apps similar to Semporium are Netvibes (Free Personal), MyFav.es (Freemium), Bookmark Ninja (Paid) and Awesome New Tab Page (Free).
Netvibes is a multi-lingual Ajax-based personalized start page or personal web portal much like Pageflakes, My Yahoo!, iGoogle, and Microsoft Live. It is organized into tabs, with each tab containing user-defined modules.
Enhance your Google Chrome New Tab Page with ultimate customizability and power. Awesome, like you. Features: - A New Tab Page with more than just icons; meet dynamic widgets - Move things around to fit your needs. Remove things that don't.
Symbaloo is a personal start page, your personal desktop for the Internet. By clicking on a block you surf easily to your favorite websites such as eBay, Facebook, Google or the Whitepages. Also you can listen to the radio, check your Gmail or use the widgets.