Spott - API to work with cities, countries and political divisions.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
IP Location - IPLocation.io provides a free lookup tool to check the location of your Public IP Address. It finds this data through various GEO IP databases and online services. Just enter an IP and check its location easily.
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Planet Explorer - Interactive global satellite images
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.