ASTD launched their Trainer's Toolkit app for iOS and Android. I've downloaded it on my Android phone within one minute, I found the next ice-breaker I'm going to use at our next departmental managers' meeting.
You can find activities based on closings, energizers, forming groups or topical openings. You can also find activities based on the group size or time for the activity. After I found an activity I wanted, I could "star" or favorite the exercise. You can also add your own notes and save it with the activity description. You can even add your own activities.
While the idea is great, I found almost every time I open the app, I am forced to restart it. I tried to use the timer button next to the activity, only to have the app completely freeze my phone so I had to force reboot. It's a little slow in response, but that I can deal with. I'll hold on to the app and hope that updates come that will make it a better experience.