File Upload Types is quite a popular #wordpress #plugin allowing to define which file types the user can upload (for example to Media Library) and it is free.
Though it was not updated for quite an amount time.
Now it’s changed! We just released a new version. All the features have been developed by me but with great support in QA and code review from my #wpforms team.
And it is not my last word! The next release is on prod.