Blur for Email/Phone/Credit Card Privacy
If you're like me, you hate giving out your email to new websites. Its just one more place that is going to spam you and give your email to 3rd party services who will intern also spam you.
Enter Blur from Abine. Blur allows you to create email, phone, and credit card aliases that forward to your real ones. This allows you to give out the info during registration/checkout but allows you to disable the card, number, or email if you believe its been hacked or no longer want to use the service. The email masking is free, while the phone and CC masking require a paid subscription.
I've been using the software for a few months and its been stellar so far. It is available for Android and iOS.