Applications include fresh implementations of a DHCP client, FTP client and server, HTTP server, IRC client, Telnet Client, SNTP client, Ping, and some other goodies. (These are not stale ports of old code.) Everything runs in 16 bit DOS and the library is open source.
The target is retro-computing hobbyists and people stuck with embedded solutions that use DOS. A good FTP client can be a godsend in that situation.
Reminds me of that era, when office computers didn't support TCP/IP at the system level: applications had to implement their own stack.
1990s-me used NCSA Telnet on the Mac every day.
Once Windows Sockets API was nailed down, a good TCP/IP stack was available on DOS as a system network driver. And IIRC Apple released a system service as well, as a System extension and Control Panel.
I'm not sure if that's stupid, but I've done a lot of things with raw ethernet frames, and used LWIP, but...I'd like to develop my own someday, just to "know" how it's all really supposed to work.