Is there a proxy testing application on OSX?

I remember I have used a Windows proxy testing software a long time ago. The software allows me to input say 100 proxy at a time, and I could set a destination url (for example, Google.com or http://ift.tt/Y1L1bD) and then test how many proxies in the list can visit the destination url (and at what speed). I am wondering if there is a similar application on OSX can do the similar thing. Thanks!