Chat & Instant Messengers

• Wiztoo
  Wiztoo is a spy software able to observe MSN chats that pass through a local area network. Wiztoo also captures e-mails with their joined parts and can intercept some passwords.
  
• World of Chat Messenger
  Chat instantly online with your friends using World of Chat messenger
  
• x Chat
  Free Intranet private real-time TTS chat
  
• Yahoo Messenger
  Chat, Instant message, SMS, PC Calls and More
  
• Yahoo Pal
  Yahoo! Messenger Add-on Program
  
• Yak!
  A text-based, chat application for LANs.
  
• YBots
  YBots is an automated chat solution
  
• YM BugFix
  A chat tool to fix the Yahoo messenger.
  
• YTK Lite
  YTK Lite - The Yahoo! Messenger-Integrated Chat Companion
  
• Zbit J-Chat Pro
  The J-Chat Pro is fast, reliable, scalable.
  
• Zeus Audio/Video Chat for Communities
  Zeus Audio Video Chat For Communities
  
• Zim
  Chat and Instant Messaging Sserver for Windows 2003/XP/2000