Top 5 best REST API
In your opinion what would be your top 5 REST APIs when evaluated based on (a) consistency with the REST philosophy, (b) compliance with web standards and (c) just plain ol good software engineering.

In a previous question, http://stackoverflow.com/questions/7551/best-practices-for-securing-a-rest-api-web-service, some names were thrown about namely Amazon S3 & flickr. 

Thanks
Top 5 best REST API
===

In your opinion what would be your top 5 REST APIs when evaluated based on (a) consistency with the REST philosophy, (b) compliance with web standards and (c) just plain ol good software engineering.

In a previous question, http://stackoverflow.com/questions/7551/best-practices-for-securing-a-rest-api-web-service, some names were thrown about namely Amazon S3 & flickr. 

Thanks