GetJar’s clever draw is to offer premium apps to users for free to generate traffic, and then monetize that traffic with advertising dollars. App developers considering GetJar might be tempted by the virtual currency tie-ins, and the option to target new users with different kinds of promotions. Be warned, though, the submission process might take a while. Droid App
Slack has gone from the new hotness, to controversial productivity tool, to essential office tool faster than you can say "hot take." With a familiar, instant messenger feel, it's easy to get started with Slack. But the service became popular because of its wealth of advanced features, like customizable alerts and a Do Not Disturb function. You can even host VoIP calls through Slack with your coworkers. A free account will get you started, but a monthly fee unlocks even better search tools. And be sure to install the Giphy plugin for maximum productivity.