Open-source invoicing, quotes, and payments.
Invoicing & freelancers listings
Cards
Invoice Ninja
invoiceninja.com
Invoice Ninja
Open-source invoicing, quotes, and payments.
Bonsai
hellobonsai.com
Bonsai
Contracts, invoices, and accounting for freelancers.

Wave
waveapps.com
Wave
Invoicing and accounting for small businesses.
Xolo
xolo.io
Xolo
Business admin and invoicing for solo founders.