I would think $Xero(XRO.AU)$ is great for investing long term.

Xero provides accounting solutions online which is subscription based. This implies recurring revenue from corporate companies that will last for many years. That's because it'll be troublesome or even costly to keep training their staff to use new systems if the companies keep changing their systems such as accounting systems. This, in turn, guarantees recurring revenue in the long term once the customer signs on to use their accounting package.

Furthermore, Xero boosts a lot of great functions that help cut down time and makes work a lot easier. Such as automatically linking to the bank to download daily bank statements and the system also tries to suggest matching entries and this makes bank reconciliation a lot faster and simpler.

So, the very first AU listed stock that comes into my mind and probably the first AU stock I'll invest in (if I invest in AU market) will have to be none other than Xero.