Amazon S3 provides a cheap solution and easy to use solution to back up your Linux server or files on the cloud. The Linux s3cmd script lets you use rsync to backup folders and files easily.
7
Geolocation Using HTML5, jQuery and Google Maps
Geolocating a user using their browser (if supported) is quite easy using HTML5 and JavaScript / jQuery. In fact, it can be done in under 50 lines of code. Here’s my quick and dirty tutorial on doing just that.
Geolocation, HTML5, JavaScript, jQuery, TutorialFacebook API: Posting a Status Update
The Facebook API lets you post status updates (message, links, photos etc) to your timeline via the API. This is handy if you want to have automatic sharing in your application (assuming users have consented to it) to post uploaded photos, links etc.
Facebook, Facebook Graph API, TutorialWonga Halloween Trick or Treat App

For Halloween, I helped wonga.com reskin an old app they had originally developed with a third-party agency. The app used Adobe Flash as the main user interface, with a PHP / MySQL backend.
Application, Facebook, Wonga.com