What network communication tools do Hong Kong people have?

MSN MESSENGER is an instant messaging software released by Microsoft, which can communicate with relatives, friends and work partners in real time, such as text chat, voice conversation and video conference.

Skype is an instant messaging software, which has the functions required by IM, such as video chat, multi-person voice conference, multi-person chat, file transfer, text chat and so on. You can make high-definition voice calls with other users for free, and you can also make domestic and international calls. You can make direct calls from fixed telephones, mobile phones and PHS, and you can realize the functions of call forwarding and sending short messages.