Here's a convenient feature we hope Microsoft's Skype brings to our shores soon: join chats right from a direct link. It doesn't even require the people you invite to have a Skype account. All you need to do is send a link to someone, say, through Facebook Messenger and have them join your current chat session on Skype. They don't even need to have the app installed because there's Skype for Web. The guests can join video conversations, send instant messages, and make voice calls. Those who do have Skype accounts and the mobile app can do so through links on Android and iOS. It's now available for users in the US and the UK but will be coming to other countries in the next couple of weeks. Skype also plans to introduce then the ability to share direct links from the mobile apps but they won't give a timeline yet when that will happen.
Source: SlashGear