SIREN.io - Siren is an investigative intelligence platform.
ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Lampyre - Lampyre - an efficient data analysis and OSINT multi-tool for everyone.
fusebill - Fusebill is the leading recurring billing and subscription management software for businesses. Try Fusebill for subscription billing made easy!
dradis - Dradis is the open-source reporting and collaboration tool for IT security professionals.
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.