Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Procore - Procore is the world's most widely used construction project management software. Easy to use, mobile platform with unlimited user licenses.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Corecon - Corecon offers integrated estimating, project management, and job costing for small to medium-sized construction companies.
Meetabit - All the local tech and startup meetups in one place - easy to organize & attend
SummitVista.io - Summit Vista end to end short and long term property management