http://en.wikipedia.org/wiki/List_of_Google_products

Organizational data

Google Apps for Work includes:

• Gmail Kolab, including Roundcube or Thunderbird
• Calendar -> Kolab for appointments and Tiki Calendar for public events
• Docs -> Tiki Wiki with or without WYSIWYG
• Sheets -> Tiki Spreadsheet
• Slides -> Tiki Slideshow
• Hangouts -> Otalk & Jitsi
• Voice -> FreeSWITCH and FusionPBX
• Drive -> File Gallery
  • Data stored on ClearOS Flexshare and Syncthing for automated sync
• Sites -> Various feature in Tiki: Wiki, Blog, RSS, etc.
• Contacts -> Tiki Trackers can be configured as a CRM. But even better would be to integrate with Kolab to have better integration in mail system
• Apps Script -> For End user programming, use the existing feature set in Tiki. Especially Trackers. JavaScript and jQuery can be used in wiki pages. For more advanced use cases, you can use Tiki as Framework or even direct PHP & JavaScript.
• Analytics -> Piwik
• Picasa -> File Gallery
• Tasks -> Tiki Trackers or Tiki Tasks or Kolab Tasks
• Google+ -> Tiki can be configured to make you own Social Networking site.
• Groups -> Forums
• YouTube -> Kaltura
• Google Vault -> Kolab Bonnie

Public data

• Search: We won't do search of public data, but for all your internal data: Elasticsearch, including Search within files and increasingly some Natural Language Processing (NLP) features.
• News: Tiki can aggregate news via RSS: Article Generator
• Maps: Tiki Maps can use Google Maps but also OpenStreetMap and others thanks to OpenLayers

Other

• ChromeOS -> Fedora LXDE
• Play -> F-Droid
• Chrome -> Firefox

Related links

• Alternative to Microsoft