I've found freetype-gl library I want to use. It has new BSD license and I'd like to use it in my closed source commercial project.
Can I do it?
Did you read the license? Because it's pretty short and I think easy to understand. Unless your lawyer tells you otherwise, I'd say that yes, you can use the code, but you have to put their notice & disclaimer in your documentation (about box, whatever).
Yes. You can use BSD-licensed projects in closed-source, commercial projects. You must include the original copyright and license.
The BSD License allows proprietary use and allows the software released under the license to be incorporated into proprietary products. Works based on the material may be released under a proprietary license as closed source software, allowing usual commercial usages under.