Small business owners or project managers should take a look at Unison, a business app that allows employees to talk quickly and privately, share documents, pass around voice memos and even set up “rooms” to discuss specific topics. The service has free and paid tiers. Pricing is available upon request, but will give you more official customer support and storage space. But if you’re looking to cut costs and want a solid collaboration app, Unison is a fine way to get everyone on the same page. Free, for Android and iOS devices.