Shapr - A completely free way to build your professional network.
Eventtus - Engagement platform for events.
GetReal - Meet new people, in person
ColdInbox - Quickly Send Automated LinkedIn Messages That Convert Your High Value-Prospects Into Leads And Then Customers Without Having to Spend $$$ in Advertising!
Event Hunt - Startups and Tech Events Curated By Locals
Palaround - Meet people you should be friends with.