http://jsonviewer.stack.hu/
Handy online visualiser for json data. Can get slow with large files, but it's useful nonetheless.
http://www.askthepony.com/blog/2011/07/setup-a-complete-django-server-deploy-rollback-%E2%80%93-all-in-one-powerful-script/
A script to set up and deploy django servers. Hat tip rob.
http://www.twilio.com/
Developer APIs for placing calls and sending SMS messages. Handles both incoming and outgoing, but only sends texts in the US and only has incoming US / Canadian numbers.
http://www.wunderlist.com/
Funky open source web app around task management that syncs and has a client across Mac, Win, iPhone, Android. Apparently no linux support. Built on top of Titanium from appcelerator.