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Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.

It is a software platform designed to allow developers to easily create cross platform applications part of the .NET Foundation. It is an open source implementation of Microsoft's .NET Framework based on the ECMA standards for C# and the Common Language Runtime.

PayPal is an online payments and money transfer service that allows you to send money via email, phone, text message or Skype. They offer products to both individuals and businesses alike, including online vendors, auction sites and corporate users. PayPal connects effortlessly to bank accounts and credit cards. PayPal Mobile is one of PayPal’s newest products. It allows you to send payments by text message or by using PayPal’s mobile browser.

Google Analytics lets you measure your advertising ROI as well as track your Flash, video, and social networking sites and applications.

Tag Manager gives you the ability to add and update your own tags for conversion tracking, site analytics, remarketing, and more. There are nearly endless ways to track user behavior across your sites and apps, and the intuitive design lets you change tags whenever you want.