Google Project Hosting is a great place to host and share open source projects, and files for your websites and other web projects. Now Google has added a new feature that lets you edit files from your browser rather than upload a new version of it.
Just look for the “edit file” link on files in the online source browser. As you edit, you can preview the diff of your changes so you know exactly what you are committing. The online editor is powered by CodeMirror.
If you don’t have commit privileges to the project, you can file your changes as a patch in the project’s issue tracker. If your patch is approved by the project owner, your changes will be added to the file.