Then I thing it should be "3rd party announcements"
The fact that there are (according to you) mainly libraries/components is a matter of what people want to announce.
People can also invite to discuss their achievements in the "Other" board,
That would only be if they present something that is not an Announcement. But if they want to discuss (ongoing) work, then that should be done in a board covering the technology (eg databases, or gfx, depending what the app is about)
If indeed, a lot of traffic is generated by topics of that kind, that indeed can be proven not to fit into any existing board, then a new board can be discussed/added.
Currently I think we have the board, but need to get the people who want to add topics.