48110 is owned by GrainCorp, and is currently being overhauled to be returned to service.
838 is owned by Pacific National, and has been in storage for many years, as is 833 at Cootamundra (although 833 is in far worse condition, as seen in 2008. It has gotten worse since then).
The unit on the right is Number 55, a former BHP Newcastle shunting locomotive named "Folly". Purchased originally by Austrac, it later passed to Junee Railway Workshops, where it has remained ever since.