some shields

README.md

@@ -29,6 +29,10 @@ C/C++ programs available in [src/poc/](https://github.com/dankamongmen/notcurses
 [capabilities of terminal emulators](TERMS.md), and also maintain a list of
 [other TUI libraries](OTHERS.md).
 
+![Linux](https://img.shields.io/badge/-Linux-grey?logo=linux)
+![FreeBSD](https://img.shields.io/badge/-FreeBSD-red?logo=freebsd)
+[![Sponsor](https://img.shields.io/badge/-Sponsor-red?logo=github)](https://github.com/sponsors/dankamongmen)
+
 <a href="https://drone.dsscaw.com:4443/dankamongmen/notcurses">
 <img src="https://drone.dsscaw.com:4443/api/badges/dankamongmen/notcurses/status.svg" alt="Build status">
 </a>