What is it? Pet peeve: OSS projects that don’t clearly state what the heck the thing is.
On many pages like this, you can get to the general description through a link on the page. It’s most convenient when it says About, Overview, or Features. However, many of them just say the name of the project in isolation or next to other ones. Load up the Lobster’s submission, look to the right side of page, notice the project list with item called tbox, and click that to find what you seek.
A glib-like multi-platform c library. You can see the github link: https://github.com/waruqi/tbox