This wiki collects information about prepaid (or PAYG) mobile phone plans from all over the world. Not just any plans though, they must include good data rates, perfect for smartphone travellers, as well as tablet or mobile modem users.
Python library for interacting with many of the popular cloud service providers using a unified API. Supports over 50 different hosting providers. Good for avoiding vendor-lock in, because all you have to do is point your code at a different provider and the rest should still work.
FrequencyCheck is a website that helps you determine if your current cellphone will work on the cellular networks of a particular country. You can either search for devices compatible with a particular carrier, or carriers compatible with a certain mobile device.