Where QuickBASIC gets much more powerful.
RockIRCd is a powerful DOS-based Internet Relay Chat (IRC) server, designed from the ground up to run as a highly customizable dedicated application.
leetIRC is a powerful DOS-based Internet Relay Chat (IRC) client, written with the intention of being the most feature-rich client you can find for DOS. With support for mIRC color codes, bold support, DCC file transfer, and much more; I believe it is.
WebServ is a DOS-based HTTP server. It is one of my older applications, and it does what it claims to do. Stay tuned, because there will be an update available soon that adds much more functionality.
NTCPQB is the stand-alone download containing my own QuickBASIC v4.5 and v7.1 compatible TCP/IP routines. It allows any QuickBASIC programmer to effortlessly create their network and internet-capable programs that interface with Trumpet Software's TCP/IP stack TSR for DOS!
CHASE is a DOS-based POP3/SMTP e-mail client for x86-compatible computers.