I just released a web application for generating typos. This service exposes a resource that can simply be invoked by the browser or any http client (eg curl) and returns a list of strings that look like the original string. For now the request is not that much customizable, the next releases will allow you to configure the algorithm that generates the strings.

The application can be found here: http://typ0generat0r.com
The application is available to everyone with few limitations:
- no more than one call every three minutes for each client
- maximum length of the text to be used to generate the typos must be eight characters
To overcome these limits you can ask me for a key through which you can use the application without limitations,