Syncing Invoice Ninja and NethuntCRM is currently on our roadmap
Invoice Ninja is a free, open-source solution for invoicing & billing customers. With Invoice Ninja, users can easily create and send professional invoices from any internet-enabled device. Clients can print invoices or download them as pdf files as well as pay online from within the system.
NetHunt CRM - your smart inbox for Gmail to automate business processes around email handling. It is a full-featured CRM solution inside Gmail and Google Apps.
PieSync is easy to use and helps you build your business by increasing productivity. Our two-way contact integration will decrease data errors and ensure that you and your team will have access to the most up to date customer information.