FaeNET
This is a chat network for a large community of people, mixed with games, computer hardware and software, and help with various topics. Originally a gaming network.
ForestNet
Supports different charsets (especially Russian and Ukrainian). Native charset is UTF-8. Features include own services, support of channel forwarding, and a family suited chat atmosphere.
ForeverChat
Information on the net's services, acceptable user policy, servers, and rules.
FoxChat
Network homepage that has information pertaining to server linking, servers, rules, popular channels, and updates.
FreeBSD Hackers
Site contains FreeBSD help and things related to the FreeBSD Project, Programming and UNIX. Also contains network staff list, t-shirts and information.
FreeFunChat
A small network suitable for all ages. Site includes news, downloads, Java chat, server and channel statistics.
Freenode
Provide a friendly interaction environment for project coordination and for the support of community projects. Includes a server list, philosophy, rules, how to help, and internal projects. Formerly openprojects.net.
Freeworld
Aims to provide a friendly chatting environment. Includes full services, a java applet with no need for a client, server information, and user biographies.
FusionChat
Offers Java games, online diarys, user profiles and message boards.