My personal choice: Talend API Tester - Free Edition (formerly called 'Restlet').
It's straightforward, and (most importantly for me) works seamlessly through a corporate proxy. I also like it's approach for having a hierarchical tree of saved queries, which can be easily exported and traded between developers (I'm sure there are superior, centralised solutions but this works well in our team).
It's straightforward, and (most importantly for me) works seamlessly through a corporate proxy. I also like it's approach for having a hierarchical tree of saved queries, which can be easily exported and traded between developers (I'm sure there are superior, centralised solutions but this works well in our team).