Every time one of them changes, you'll see an update here.

Aliexpress
View the changes on Github

Foursquare
View the changes on Github

Fitbit
View the changes on Github

Fidelity
View the changes on Github

Fiverr
View the changes on Github

Earthlink
View the changes on Github

Fedex
View the changes on Github

View the changes on Github

Fandango
View the changes on Github

Elearners
View the changes on Github