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Google service rewrites your server's pages on the fly to speed up delivery

Cloud-based server monitoring and reporting.

Site performance and security 

Github provides "Social Coding".

Git, originally developed by Linux Torvalds (of Linux fame), is a distributed version control system for software code. Every Git directory is a full-fledged repository with complete history and full revision/tracking capabilitiies.

Github makes the Git software available as a service. Users can manage public and private repositories and collaborate with others to manage code development.

Free code hosting site using the Mercurial free code management software. 

Cloud and managed service providers need proof that their infrastructure is secure and compliant. Their customers need to see their own security and compliance data, too. Tripwire helps providers address these needs and assure customers it's safe to move into the cloud.