I need to store a relational Db on the cloud for a college project. Does any1 know of a service that offers a free trial period or even a free student usage (some chance). I already have the application working with a MySQL Db (phpMyadmin), ideally a service that would require very little changes to my app would be the best solution. I have had a look at amazon RDS but there is no trial, I also had a look at Aptana, but a pro version of their IDE is needed ($99). Any help would be greatly appreciated.
WSO2's Data-As-A-Service is the best way to suffice your requirement. What you have to do is, just simply create a domain for yourself in stratoslive [1] (demo is the free version available there) and consume its Data-As-A-Service solutions which enables you to create a relational database free of charge to be used in your application. This service would create a mysql database in the Relational Storage Service offered by WSO2. For further details, refer the article located at [2].
[1] https://stratoslive.wso2.com [2] http://wso2.org/library/articles/2011/09/wso2-unveils-its-relational-storage-solutions-wso2-stratoslive
Cheers, Prabath