https://www.yammer.com/
Kind of like Facebook for businesses. At first, sounds kind of silly but it turns out, this kind of platform is very valuable to a company. Companies are based upon information and communication. The days of the manufacturing based companies are virtually gone, now bosses, staffs and shareholders work in a business of data and the more efficiently data can be handled the better. Yammer can change a company's entire organizational structure.
Yammer: used by Unicef, Reuters and Deloitte
Free or $5/User/Month (One sign-on/ multiple domains/ custom branding)
Yammer provides the following features:
Enterprise Microblogging - Start a conversation, read posts, and actively collaborate with your coworkers in real-time. The value is that workers can exchange ideas on projects quickly instead of waiting for meetings. This also cuts down on redundancy in operational tasks.
Groups - Create and join private or public groups and collaborate in small teams within your network. Workers who work in geographically far away locations can easily work together.
Files, Links, and Images - Upload and share documents with co-workers, groups, or your entire company. Now anyone can come up with a good idea, not just the boss or the guys in development.
Company Directory - Use Yammer to connect with employees in other departments.
Topics - Tag content and messages in your network to make content easy to organize and discover. This is invaluable because this means that anyone can access a file instantly, which would multiply efficiency
Mobile - Connect to your network anywhere, any time. Download free iPhone, BlackBerry, Android and Windows Mobile applications. Now you’re truly always at work.
Profiles - Upload a picture and fill in your expertise, past work experience and contact information to become discoverable across your organization. Personalizes everyone across an organization, thus making it smaller.
Direct Messaging - Create a private dialog with one or multiple co-workers.
Communities - Create communities for working with partners who are outside of your network.
Applications - Install third-party applications into Yammer to increase the functionality of your network. Integrate Yammer into applications so that ideas and data can be shared even more readily.
Security - Message privately and securely in the cloud. User passwords stored on our servers are encrypted by a strong salted hash algorithm.