when an application gets updated we can get the changes from its corresponding changelog.
But what about new apps? Is there a list somewhere?
If not, it probably can be automatically generated with git? e.g. Date of first commit on its folder, assuming that date of first commit and date of merge to master are not far apart. Probably a bash script like this:
for appfolder in apps/*/; do echo "$(git log --follow --format=%ai $appfolder) $appfolder" | tail -n 1 ; done | sort -r