autopkg VS munkireport-php

Would it be Autopkg https://github.com/autopkg/autopkg or autopkgr https://github.com/lindegroup/autopkgr by any chance?

I’d recommend you look into AutoPkg (https://github.com/autopkg/autopkg). It can do exactly what you ask - check the repo for new releases, and download them. It can even package them up if needed, or customise the package for you. Depending on the MDM you use, and/out your scripting ability, you could even have it upload the package to the MDM.

AutoPkg (Terminal app, takes recipes from GitHub to build packages) https://github.com/autopkg/autopkg

Something fancier would be setting up an autopkg build box a + munki server to deploy applications like a real macadmin.

Autopkg https://github.com/autopkg/autopkg

If anyone comes across this with the same question I found a helpful utility is autopkg. https://github.com/autopkg/autopkg Instead of a simple notification, I created a daily job that runs an autopkg update on selected apps I care about and adds it to my Testing Manifest Munki Repo. The Manager Software Center app notifies me when a package has an update the next time the client checks in.

MunkiReport (Munki clients report here) https://github.com/munkireport/munkireport-php

I'm not sure that is going to do what you want, but then again I have no SCCM experience with Macs. Since you have a small number of Macs and your company isn't willing to spend money on new services, I think you might want to look at Munki. It's an open source tool to distribute and run PKG installers. It is often set up on a Linux system. So if you have a VM infrastructure, you should be able to set this up for free. This article should get you started. If you find this to your liking, you can also add some tools to give a graphical interface to Munki, such as Munkireport-php.