Filedart

Filedart is a simple Menu Bar program that provides you with an easy and quick way to share files with your co-workers and friends.

The application lives on your status bar without using many CPU resources, supports drag-and-drop actions, and comes with an integrated and comprehensive help guide. Before using this utility I recommend studying this built-in manual. It will teach you how to share documents and take screenshots.

All you need to do is drag-and-drop the files you wish to share and the app will provide you with a URL that's copied to your clipboard. If you paste the URL in your default browser, you gain access to the selected files.

When it comes to sharing screenshots, you need to hit a certain combination of keys (Command+Shift+4) and select the area you wish to capture. Then, the program gives you access to a URL which can be shared with other people.

My only issue is that the URLs work only for a week. The developers don't offer you any options to extend this interval of time.

Nevertheless, this application is free of charge, very simple to handle, and immediately offers you the URLs you need. Hence, it's worth a try if you're looking for a simple way to share data with other users.