I use http://www.paymo.biz/ http://www.paymo.biz/ and a spreadsheet to invoice. I also use a shared spreadsheet to track TO DO items and provide rough estimate

I use http://www.paymo.biz/ http://www.paymo.biz/ and a spreadsheet to invoice. I also use a shared spreadsheet to track TO DO items and provide rough estimates. My need is minor - almost anything would do.