Accounting tools
Xero
AccountingCloud accounting with invoicing, bank reconciliation, GST tracking and BAS lodgement.
Paid; Comprehensive from A$107/mo incl. GST (new-customer discounts offered)
MYOB
AccountingAustralian accounting. Solo by MYOB is a mobile app for sole traders with invoicing, expense tracking and tap to pay.
Solo app A$99/yr; Lite A$315/yr; Pro A$70/mo (intro offers available)
QuickBooks Online
AccountingCloud accounting with GST tracking, BAS e-lodgement, invoicing and bank feeds.
Paid plans (Simple Start, Essentials, Plus, Advanced); see pricing page
GnuCash
AccountingFree, GPL-licensed personal and small-business accounting software for Linux, macOS and Windows.
Free, open source