BillGrid.com - BillGrid is an easy to use online invoicing, billing and expense management system that will save you time with tracking clients projects, expenses, invoices and payments.

ContractorPlus - Everything home service contractors need in one app.

ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.

Payable - Easily manage and pay your contractors

Elorus - A super-easy online invoicing & time tracking software

Bold - Ultra-fast anonymous publishing platform.