http://www.getballpark.com/ http://www.getballpark.com/ http://www.campaignmonitor.com/ http://www.campaignmonitor.com/ http://www.getharvest.com/ http://www.ge

http://www.getballpark.com/ http://www.getballpark.com/ http://www.campaignmonitor.com/ http://www.campaignmonitor.com/ http://www.getharvest.com/ http://www.getharvest.com/ also you can find a bunch of other good examples on http://cloudomatic.com/ http://cloudomatic.com/, a directory of SaaS applications