[karussell]

Probably the author would have been interested in an article which I didn't finally publish ;) ... here are some (not always good ;)) Google alternatives

    Search: DuckDuckGo, Bing, Ask, Wolfram Alpha, Yandex, Baidu
        Scholar: TODO
        Patent:TODO
        Image: Bing
        Shopping/price compare:
    Photos (Picasa): Flickr, SmugMug
    YouTube: Vimeo
    News: Yahoo, TODO
    Mail: Yahoo, Hotmail, Thunderbird, Fastmail
    GDrive (storage): Spideroak, Dropbox,
    Documents: Microsoft, Zoho, OpenOffice
    Calendar: Zoho, Hotmail, AOL Calendar, 1Calendar, Outlook, Thunderbird, 30 boxes
    Chrome (Browser): Firefox, Opera, Safari, Chromium with Chromatic
    Google+: Facebook, Twitter, Identica, Diaspora, LinkedIn, Foursquare
    Maps
        routing: OSRM, Bing (=Yahoo), MapQuest, GraphHopper ;)
        local search: Yelp, Bing (no API!)
        mobile: TomTom
        Google Streetmaps/Earth: Bing 3D
    News: Netvibes (full of google search ;)), Yahoo, Twitter, breakingnews
        Reader: Netvibes, liferea (Linux only)
        Alerts: Netvibes
    Translation: Microsoft
    Analytics: Piwik
    AdWords: TODO
    Google Books: nothing found!?
    Google Sites: Wikispaces, Zoho
    Google Talk/Hangout: skype, talkyoo
    Blogs: Wordpress, tumblr
    Code: GitHub, SourceForge, BitBucket
    Groups: SourceForge
    Checkout/Wallet: TODO
    Google Apps: Amazon
    Speech Recognition: Nuance
    Google Voice: PhoneBooth
    Google TV: Apple TV, Samsung, LG, ...
    Chrome OS: it's Lubuntu!
    Smartphone (Android): iPhone, Nokia, BlackBerry, Ubuntu
    Play Store: Apple Store
        music: spotify, itunes
    Self-driving car: BMW, Audi, Volvo, Mercedes-Benz, Toyota, Nissan, ...

Parts of those information through lifehacker

ToDos for Google: Offline routing, Own Games, Porn, Ebay, Amazon clone