E2V: I use this to get calls when one of my servers go down and whenever my PayPal account is hit. It's a little difficult to setup for regular users (email filters aren't commonly used) but it is pretty reliable. It uses Twilio and Cloudmailin.net. I just created an HN coupon for 5 additional calls: https://zetabee.com/e2v/?coupon=hackernews
Text: I use this constantly to note down and plan everything. E.g. here's how I note down random ideas: https://zetabee.com/text/share?n=1058338736&h=MU54djV5VF...
CashFlow: This app enabled me to plan my departure from my old job without going into a financial crisis. It has a slight learning curve but once you get used to it, you can plan your finances very easily. I run hypothetical scenarios with my wife all the time - can we afford a house worth X in October? Should she switch to part time and get a 2nd contract? How much can we spend on a vacation and when?