Hi,
I am a freelancer looking for a good web service for time tracking, billing, customer management etc. There are a couple like Harvest which are out there. Can anybody recommend any other, based on experience?
Thanks,
I use freelance manager from codecanyon, you can also check out Duet from codecanyon too. All in one solution for a freelancer like you 
The simplest and fastest time tracking & billing solution is eBillity is a secure web and mobile time billing & tracker tools for professionals & freelancers.it’s have awesome feature, it’s can accessible anytime, anywhere.