Global caches

Dear Nanog Community, Some CDN providers such as Akamai and Google (often called Global Google Cache) are offering caches to ISPs. It is very convenient for small ISPs to alleviate bandwidth towards the provider, but also the CDN provider benefits by putting source of data closer to the user resulting in far better performance. Does anybody know of any other CDN providers that offer similar caches? Looking forward for your replies. Regards, Kyle