Flamingo

Flamingo is a beautiful, native instant messaging client for OS X that supports Hangouts/Gtalk, Facebook, and XMPP.

Highlights:

• All-in-One design. Buddies, conversations, and chats in a single window.
• Multiple, detachable chats in a single window.
• Inline previews for images, videos, and tweets. Supports CloudApp, Droplr, Instagram, and YouTube.
• File transfer via direct connection (compatible with Messages, Adium, and other clients), CloudApp, and Droplr.
• Reply to messages right from the notification bubble in OS X 10.9.
• Full conversation history browser with fast message search and many filtering options.

NOTE: Due to service limitations, Flamingo does not support group, video, and audio chats in Facebook or Hangouts/Gtalk, and MUC (Multi User Chat) for XMPP is not supported.

What is new in this release:

Added preferences for enabling/disabling notification sound, as well as choosing whether it plays in the foreground and/or background.