Harvest and Freshbooks integration in Apollo!
It is no secret that Apollo is internet-based software: Apollo's users can access their data either by using Apollo's great UI, or by "connecting" to Apollo's API (you can see the API as a means to access Apollo taking the UI out of the equation). The API can be invoked by your own scripts (if you are a developer), or by other online programs, in order to access your information.
While this means that potentially every SaaS out there can integrate to Apollo, we realise that it's important for us to make this as painless as possible, and decided to actively work on integrations.