Ask a bunch of enterprise experts what their favorite software as a service providers and you're bound to get a lively debate---and a nice survey of the field. What follows is an list of the SaaS landscape and notable companies to track.
This list was compiled from the Enterprise Irregulars mailing list. The initial question was simple enough: What are your favorite SaaS companies? The only real ground rule was that participants couldn't nominate Salesforce.com---after all the company is already well known. What this list highlights is just how big the SaaS game is. Some of these companies are well known and others are largely unknown. There are also a few outlets from New Zealand, which looks to be a bit of a budding SaaS hotbed.
Now this list isn't comprehensive by any stretch, but it's a handy start. Here's a look by category.
Business intelligence, analytics:
CRM and HCM: