Does anyone know if an integration between Moodle and eSchoolPlus (a product of Sungard / Powerschool) has been created?
This is as good a place as any. What has your web searches found so far? Here is what I found with reference to Moodle and Powerschool
https://moodle.org/mod/forum/discuss.php?d=89474
https://moodle.org/mod/forum/discuss.php?d=242096
And I suspect the overall answer to your question is no. I don't quite understand why there are not more integrations with School Management systems because basic exchange of data is not that hard to implement.