Invoice Ninja – Leading Open-Source Platform to Invoice Clients, Track-Time, and Get Paid!
Free for up to 100 Clients & Unlimited Invoices & Quotes (hosted version), or paid plans for higher usage, or if you install and host it yourself it is completely free including all premium features. There are also Android and iOS apps.
See https://www.invoiceninja.com or listen to the FLOSS Weekly interview about the product at https://www.youtube.com/watch?v=RbXXUHABGRU (which is where I heard about it).
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Free Open-Source Invoices, Expenses & Time-Tracking | Invoice Ninja The leading free open-source online invoicing app for freelancers & businesses. Invoice, accept payments, track expenses, create proposals, & time-tasks |