What is the best way to share links with colleagues?

Question

Work organization

Very often we share interesting links with colleagues via Skype. And then they get lost in dialogues and in time. What can be the option of exchanging and storing links?
As if they created a VKontakte group and every time they threw off links to the wall with news.
Can someone tell me how else it can be implemented so that colleagues can be connected to one source.