CppDB - SQL Connectivity Library
SQLAPI++
Abstract Database Connector
BillGrid.com
ChargeOver
MinuteDock
fusebill
Elorus
Invoicera
MONEI
Street Invoice
CppDB - SQL Connectivity Library
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SQLAPI++ - SQLAPI++ is C++ library for accessing SQL databases (Oracle, SQL Server, Sybase, DB2, InterBase, SQLBase, Informix, MySQL, Postgre, ODBC, SQLite, SQL Anywhere).
ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Abstract Database Connector - Abstract Database Connector is a C/C++ library for making connections to several databases (MySQL...
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.