One-time contribution is when you fork one of
ITSA's repositories, make changes or additions and create a pull request. This is something anyone can do. Most likely you will be making changes to the code or documentation.
Changes to a code also leads into writing tests and updating documentation and API. The project-members will quarantee this is done before the code gets merged. If you feel like you want to contibute all aspects, or want to make additions, you better become a project-contributor.
Important note:By making pull requests to ITSA's modules, you commit yourself that the code will be licensed under the New BSD License.