What are some alternatives?
Bloomfire - Let Bloomfire help you get organized! Organize your content, build your company knowledge base and help your employees to be more successful.
Explorer for GitHub - Explore GitHub from your Mac menubar or iPhone
Flock - A faster way for your team to communicate
Ooshot - Hire a photographer. Fast and secure.
Communifire - Enterprise Social Collaboration Software
Interact - Interact helps in reducing your hiring time upto 70% and significantly reduce the cost associated with it.