There are so many but the best one is the one that will implement well with your existing software and has the most tools available to your business including Fair Work Compliant templates such as employment contracts. The software typically has an initial fee to implement and then a per user license fee per month, so keep that in mind when researching options. What are the entire costs for the software from implementation, integration and per user as well as what you will get in the software for the price you are able to pay.

One of the options we like best is Employment Hero. It has helped us avoid headaches with employee management (and payroll), and it integrates directly with Xero. It also handles employee onboarding, which is so important in the scheme of attracting and retaining great employees. 

There is a free option to get started, but you need to pay (minimum $99 per month at $6 per employee) to really unlock all the benefits. 

As Sonia King mentioned there are a lot, but this one is an Australian-based business and we like it for all its features. We wrote a review on it too, in case this is helpful.