What seems to be a fairly new web based XMPP client. Owncloud and Nextcloud integrations. Standalone mode also. voice and video enabled, also. OTR enabled. /me emotes.
Jitsi is a F/OSS multiprotocol text chat/voice over IP/video chat application. It supports a large number of instant messaging and VoIP protocols, not only for IM but as transport and control channels for VoIP and video conferencing. If there's a way to get your streams through it'll do it. Natively supports OTR for protecting chats. Implements SRTP and ZRTP for encrypted conferencing. Supports DNSSEC. Aims to replace Skype as a more secure, open source package.
pure-python-otr is just what it says on the tin - it's an implementation of the Off-The-Record messaging protocol in pure Python, meaning that it doesn't hook any libraries that aren't written in Python. Useful for adding OTR support to communications software.
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