--
Pidgin

Pidgin is a cross platform instant messaging client that has multiple chat protocols including IRC. It has support for almost every other chat service available.

SpecsUpdate

PlatformsWindows, Linux

MediaVideo send/receive, Images

Message historyOptional

LicenseGPL

OpensourceYes

Video chatYes

EmoticonsAdd-on

Spell checkingYes

End to EncriptionAdd-on

Chat plugins SMS, Facebook, Discord, Skype, Telegram, WhatsApp, Steam IM, Battel.net, GoogleHangouts, Twitter feeds, Amazon Chime, WeChat, QQ, Rocket.chat, Slack, Mattermost, Tox, OkCupid,

Notification intergationAdd-on

Off the Record MessagingAdd-on

Supported protocolsBonjour, Gadu-Gadu, IRC, Lotus Sametime, Novell GroupWise, OSCAR, SIMPLE, SILC, XMPP, Jingle, Zephyr, Various extended protocols.