I use opentrack for head tracking in elite dangerous, essentially you stick the phone on your head and use its sensors over WiFi or USB. It's pretty cool.
The BEST (imo) app for project communication. Also has a desktop app for Windows, OSX, and Linux. I find that it's easier to just do it in your browser though, unless you're mobile of course.
Get paid yo. If homeless people had this, you wouldn't be able to use "sorry, no cash" as an excuse. Direct transfer from one credit/debit card to another, and no wait time (at least not any time that I used it).
If This Then That: link and automate web services, phone and apps
Tasker: automate day to day useage of your phone and apps.
Those two apps will allow you to get lazier and any good geek is lazy. And they work with most other apps and services. Suprised no one recommended those. All the other good stuff is in this thread.
What kind of tasks did you automate? "Any good geek is lazy"... but are also introverts mostly and I am reading now all the social network things you can automate with IFTTT but most geeks are not that much into social networks either. I played with those in the past but "because I can" is often not good enough reason to do something.
I use it to geofence stuff so when I get home my lights turn on. I have shows scheduled on google calender to turn on my TV. If I upload something to evernote/dropbox it then uploads it to google drive and vice versa. When I conncet to my home wifi it unlocks my PC and phone. Tons of stuff you can do.