Insightly - the best that I've found so far.

My personal and business contacts are all in Insightly. I reviewed dozens of CRM systems before settling on Insightly. I have recommended it to quite a few small business owners, and I tell them that it's not perfect because there's no such thing as perfect software, but it's closer to perfect than anything else I've found. Another way to say that is all the systems I reviewed have flaws, but Insightly has fewer flaws than the rest. By the way, I am a former database and UI designer, so I'm capable of being super critical. I could make a list of UI improvements that I'd like to see in Insightly, but most of them would fall into the "nice to have" category. Insightly has a really good tagging function. I don't use the Tasks function because it's a bit too simplistic for my needs. I think the new email functions are a really great idea, but I'm waiting for the ability to do HTML emails and being able to save templates.