Australia also has the Digital Transformation Agency[1] to do things in house like the UK does it. I’m not sure how many government IT projects use them though. Some departments also seem to have their own (competent) in house software teams, like the ABS, the DSD (Aussie NSA) and the ATO (aus tax office).
And thank god for that, because there’s also an ungodly number of consultants milking the Australian taxpayers for all we’re worth.
[1] https://www.dta.gov.au/