Indy 10 and 9 demos for just reference.
official site: http://indyproject.org
Indy10 and Indy9: http://www.indyproject.org/sockets/demos
IndySSL: http://adg.bmpcoe.org/download/indyssl
TCP/IP Delphi & Indy10 Client Server Demo: https://sourceforge.net/projects/indy10clieservr
Delphi Internet Demos: http://sourceforge.net/projects/internetdemos
Delphi Email Client: https://sourceforge.net/projects/delphiemail (not included in this repo)