If you need a fairly easy tool to quickly generate invoices, here you go. You can edit pretty much any detail on the invoice (just click on the part you want to edit). When you’re done, generate a PDF you can email to your client. Professional-looking, simple, and free!
You don’t need to sign up and register, and can use it on the fly for the occasional invoice you may need to pump out. But registering (which is also free) lets you save any invoices you’ve already created for reuse and repurposing.