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vCalc contains a library with a list of Calculators, Equations, Constants, & Datasets. Users have the possibility to contribute content to pages, rate and share them on social media. Calculators allow visitors to perform calculations and estimations. The wiki also features a knowledge base grouped by topics and a blog. The vCalc website has a highly customized look and feel and the navigation is enhanced by panels, a custom footer and menu. It's a great example of advance usages of XWiki.