BitchX is an IRC client based on ircII/EPIC4. It includes many features that are usually relegated to scripts such as CDCC and flood protection -- you can just start it and go. Development was on hiatus for a while but is now resuming.
IRCBNX Chatterbot is a moderation IRC bot written in C++ and based on the original Battle.net text gateway bot BNX Chatterbot. Like the original, it features a rule-based response system, an access system, and several moderation features.
BBot is a GNU GPL IRC bot for everything from preventing spam to just plain old welcome bots. BBot includes modules to handle factoids, away statuses, do math and more. Writing custom code for BBot is easy, and the more, the better.
Java IRC Bot is a Java framework for writing IRC bots quickly and easily. Its features include an event-driven architecture to handle common IRC events, flood protection, DCC resuming support, ident support, and more.
DC-hublink is a Direct Connect (DC++) and IRC chat link with anti-flood & autoreconnecting. Very low CPU usage, exclusion of users per hub, large posts, and 'bad words'. For all hubs (NMDC & ADC), all IRC servers, all clients; no scripts needed
Z is a security service for IRC networks written in perl, originally based on BotServ. Z is designed to prevent flood and spambots from attacking a network.
panicarea is a powerful and full-featured IRC Bot, written in C++, supporting Quakenet and standard IRC Networks. Features: a remote administration web interface, a lot of flood protections, a partyline and organization/communication between PA bots.
ircpbot is a bot that can do some usefull things like
voicing xdcc server (detection by name)
kicking xdcc leech bots (det. by ctcp version)
flood protection (kick, ban, +m +i +M +R)
some more features if people request it
Neantertal's Open IRC is a full-featured client that can connect simoultaneously to multiple IRC networks. It has adjustable built-in scripts for managing your nicknames and channels in any server, clone detection, flood protection and provides anonymity
Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.