Empdupe.com.au
Empdupe.com.au for making your year end payment summaries and empdupe files to upload to the ATO
TaxablePayments.com.au
TaxablePayments.com.au for producing your TPAR file to upload to the ATO
Tax Payable Estimator
Calculator for estimating Income Tax Payable on individual income tax returns using taxable income
GoDBLedger
GoDBLedger is an Open Source Accounting System that provides the user with normal programming goodies that finance systems tend to lack. Includes GRPC endpoints so they can communicate to their accounting system from their scripts (Automation!) and also includes a MySQL database backend so you can actually analyse the data using third party analysis software.