Nice brush always comes handy in Your workflow and if You have ready brushes to choose from, it’s even better. So for now I created a huge list of corner and border brushes to use them in Your designs, posters or graphics. Each brush actually is for one corner, so just flip them in Your brush properties ( F5 to bring up brush options panel). There are more than 400+ brushes out here, so I think You have a little list now to choose from!
Feel free to suggest your corner and border brush set in the comments below!