Well most of us doing Freelancing and we need some good invoicing system which have features which will help our work more easy and recently I came to know about fetchflow.com which I rate it one of best Free Invoicing Service I ever used without downloading anything or paying money! It's have free version which will come with all features but carry their name in Invoice but you can remove it if you want to have branding-free Invoice. You can sent invoice to your customers where you can also have option to paid by PayPal and other payment options! On top you can maintain your budget as you can also enter cost/spending you made for your projects! It's really handy invoicing tools for freelance! Please check more on their website : Free Invoicing Service You can also see demo over their which gives you more better idea. Feel free to ask any question on tools.
Yes I do but I tried all invoicing tools which charge money if you want to use all features. Although their are 2-3 other invoicing tools which is offering free but still not match quality of fetchflow.com as they allow : Unlimited Invoice Unlimited Clients You can send Estimated Invoice ( Good when you providing SEO service or link building service ) Online Payments with PayPal Manage Payments and more. You can check more features here : fetchflow.com - Free Invoicing Service Features. I like it because you can manage everything from one panel which you can't in others! In this tools you just not track your earnings but can also manage your spending information too.