Both the Telnet and IRC clients have been posted on the Flyer product page for download. These are 100% custom written for the Flyer in C/asm and are currently available for the Commodore 64 (and Commodore 128 in C64 mode).
Native ports for the Commodore 128 and 16K+ PETs are planned for the future.
Use the Retroswitch contact page to drop Brandon a line and let him know what machines you’d like to see supported first, any issues or feature requests you might have, and any suggestions for future Flyer apps!
Source: Originally posted on the Commodore Flyer website