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Mateng
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Open source web analytics respecting your visitors' privacy
Matomo
Open Web Analytics Platform
Mateng
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An open source billing system. I am creating a billing system for a customer that is integrated with TYPO3 Pros: self-hosted, open source, php, code igniter Cons: not easy to maintain custom pdf templates
InvoicePlane
Self-hosted app for managing quotes, invoices and payments