Akamai is 'that big content delivery company everybody knows'. They have a huge network and over 100,000 servers all over the world. Akamai's service offering ranges from enterprise cloud computing to HD video delivery. But you can also use Akamai for 'simple static content delivery'.
Amazon Cloudfront is a global CDN for serving static and streaming content. It works seamlessly with any origin server and other Amazon Web Services (S3, EC2), supports secure webpages and there are no contracts or monthly commitments: it's pay as you go.
Bitgravity started business in 2006, has competitive pricing, provides 24/7 phone and email support and has a strong POP presence in Australia and India.
Cachefly has a strong focus on static file serving, provides a 100% service level agreement and a 30-day free trial. POPs are in US, EU, Asia, Australia, South-America and Africa. Pricing starts at $0.37/GB and drops to $0.12/GB at high volume (50TB/m).
CDN77 London-based CDN77.com launched in March 2012 and is a low-cost CDN provider that provides static file delivery and video streaming. CDN77 has 65+ POPs around the world and offers a free 14-day trial.
CDNetworks has been in the CDN business since 2000 and has POPs in 6 continents, including an impressive 25 POPs in China. CDNetworks has a focus on emerging markets like Russia and India.
CDNify provides a pay-as-you-go CDN service with SSL support and has POPs in 40+ locations in North-America and Europe, incl. in Russia and Turkey.
ChinaCache is well-known as the CDN market leader in China, which undoubtly has to do with thei 127 POP locations and 11000 servers in mainland China. The CDN features list is impressive, including hotlink protection, custom CNAME for SSL and Purge All.
ChinaNetCenter has 300 POPs in mainland China and POPs on other continents as well, including Australia and South America.
Cotendo is a high-end CDN platform built from the ground up and is run by intelligent software. Cotendo offers all the key features and a complete staging environment for configuration testing and validation.
EdgeCast is a top player in CDN land with 24 'SuperPOPs' in the US, EU, Asia, Australia and South-America. EdgeCast offers useful features like a HTTP Rules Engine, multiple origins and CNAMEs and 3 query string caching modes.
Fastly is a new content delivery network provider with a globally distributed network of edge servers that delivers static content and dynamic content. Key features are instant purging, instant updates and spike protection.
Highwinds owns and operates its own network and has POPs in 13 cities in the US, in 7 cities in Europe, two in Brazil, three in Asia and one in Sydney. Highwinds provides an award-winning online console/control panel and real-time analytics.
Internap offers CDN services around the globe since 1996 and is a big player in the market. Internap uses exclusively paid transit connections with ISP partners to ensure quality delivery.
KeyCDN launched in 2012 and is a global CDN with their own infrastructure and POPs in US, Europe, Asia, South-America and Australia. They offer a true pay-as-you-go pricing model with a competitive global flat-rate of $0.04/GB for traffic.
Level3 is a big, 20+ years old IP network and content delivery company. Level3 owns a Tier 1 backbone, has POPs all over the world and supports all key CDN features.
Limelight is a high-end CDN with a large infrastructure: 18000+ servers in 80+ locations and direct connections to 950+ last-mile access networks around the world. Limelight offers all key features, including HTTPS with custom CNAMEs.
MaxCDN is fairly new to the CDN game (launch in 2009). Their offering seems tailored to people who want to try a CDN in an easy, cheap way: instant activation, $39.95 for your first TB and a 30-day, money-back guarantee.
NetDNA entered the CDN market late 2009. With a nice feature set (API, HTTPS, etc.), a total of 9 POPs in the US and Europe, and one POP in Hong Kong, NetDNA is getting more and more on par with the other big CDNs.
Telefónica is a large, global telco that launched their CDN in 2011. Telefónica has strong POP coverage in Europe and South-America and provides a rich feature set.
Voxel has a CDN with 20 POPs in US, EU and Asia that you can use commitment-free (Pay As You Go). The pricing is aggresive and Voxel provides a 100% uptime SLA.