Insight Employee Engagement might be a bit more popular than File-Extensions.org. We know about 1 link to it since March 2021 and only 1 link to File-Extensions.org. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
File-extensions.org lists following files for .3 extension:. Source: about 1 year ago
Check out Inventiv. https://inventiv.io We used it a couple years ago and really liked it—super responsive team and flexible tool. Source: about 2 years ago
FileProInfo - It's All About Files, Software, Online Tools - 100% Free
Matter - Create a feedback-focused culture in Slack with Matter!
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
Lucky Carrot - Make your employees super engaged, recognized, & appreciated
FILExt - Open, view and convert files online
Kucha - Employee engagement platform made for creative teams