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

Mint - Free personal finance software to assist you to manage your money, financial planning, and budget planning tools. Achieve your financial goals with Mint.

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.

Qube Money - Qube Money is the #1 new budgeting app on a mission to digitize cash envelopes! Create a budget in minutes and start spending with purpose. Download the app today and start organizing your finances.

fusebill - Fusebill is the leading recurring billing and subscription management software for businesses. Try Fusebill for subscription billing made easy!

Ledger-cli.org - Ledger is a powerful, double-entry accounting system that is accessed from the UNIX command-line.