More detail about this resource can be found on the projects page of this website click here. It is a work-in-progress that currently houses an online version of the Eastern and Central Arrernte wordlist with audio and one language game (scroll down the LHS menu to find it). Keep an eye on the site for new additions.
This resource, part of the IAD Picture Dictionary Series, is really great as it has the audio along with the online picture dictionary.
This is a great resource produced by the Arrernte-angkentye-kenhe (Yellow Shed) mob in Alice Springs. It has since been expanded and forms part of the Iwemele Itelaretyeke app.
The attached document contains a list of all kinds of resources for learning about Arrernte language and people. It is current at May 2021.