I’ve settled with FreshBooks for now. UI is a bit clunnky but it gets the job done.<p><a href="http://www.freshbooks.com/" rel="nofollow">http://www.freshbooks.com/</a>
I was using Curdbee. They have been acquired by another company called Hiveage, and we had to migrate our accounts there. So that's what I am using right now.<p>I just needed a simple invoicing app which generates and sends clean invoices, so their free plans work perfectly for me.<p>Links: <a href="http://www.curdbee.com" rel="nofollow">http://www.curdbee.com</a> <a href="http://www.hiveage.com/" rel="nofollow">http://www.hiveage.com/</a>
Currently using <a href="http://www.freshbooks.com" rel="nofollow">http://www.freshbooks.com</a><p>Definitely not the best in terms of user experience but it has enough features I didn't know I need, that it keeps me happy.<p>Things like multiple auto-reminders for late payments and reoccurring invoices saved me alot of time. I didn't need them when I was looking around at invoicing software but now I do.
I've been using Freckle: <a href="http://letsfreckle.com" rel="nofollow">http://letsfreckle.com</a> , which is promoted primarily as a time tracking tool, but has good invoicing built in as well.
I used to use freshbooks, it's great. But Freeagent does so much more: <a href="http://fre.ag/43i723zz" rel="nofollow">http://fre.ag/43i723zz</a>
Solar Accounts - UK specific, suitable for both sole traders and Ltds, with or without VAT registration. Does invoicing and accounting in one nice package.<p><a href="http://www.solaraccounts.co.uk/" rel="nofollow">http://www.solaraccounts.co.uk/</a><p>I didn't want to entrust my accounting to some web SaaS thing.
<a href="http://invoiceto.me/" rel="nofollow">http://invoiceto.me/</a> is what I use for sending out monthly invoices. The site is simple, and I keep good records. The only thing I need externally is a pretty PDF to mail to clients, and that site gives me that.
I was using invoicemachine.com but their API just wasn't cutting it for me so I switched to FreshBooks. The FreshBooks API is great: in a matter of minutes I was able to pull my hours from Harvest and generate a FreshBooks invoice. That's all I need
I've been using Harvest: <a href="http://www.getharvest.com/" rel="nofollow">http://www.getharvest.com/</a>
Works fine for me, though I don't do a lot of freelance work, so I'm not a heavy user.
<a href="http://getballpark.com" rel="nofollow">http://getballpark.com</a><p>I've used this for a few years. Great app - lets customers pay on invoices with stripe or paypal.
Nutcache - <a href="http://nutcache.com" rel="nofollow">http://nutcache.com</a><p>The thing about Nutcache is that is totally free and stable.
Fast, simple & free - <a href="http://invoiceable.co/" rel="nofollow">http://invoiceable.co/</a><p>I can bang out an invoice in under 2 mins :)
Square just released it's own invoicing tool: <a href="https://squareup.com/invoices" rel="nofollow">https://squareup.com/invoices</a>