Cloud infrastructure related services
Business productivity and collaboration software as a service
Hosted Config Management Tools
Domain and SSL certificate providers
godaddy, namecheap, 1and1 seem to frequently run promotions for $0.99 domains
http://aws.amazon.com/certificate-manager These are certificates seem to be limited for use with AWS services.
However, Komodo seems to offer one of the low price certs and also a free SSL certificate good for 90 days at this link