Here are the project pages with all the information about what GNOME's Google Summer of Code students are working on in summer 2015.
Copy the starred line below and use this template to add a link to your project page. Add it to this page in alphabetical order by your last name. Then go to https://wiki.gnome.org/action/edit/Outreach/SummerOfCode/2015/Projects/FirstNameLastName_ShortProjectName (substituting the last part with any short project name you chose), and start editing it.
If you want to see how students of the last year did their project pages, take a look at https://wiki.gnome.org/action/edit/Outreach/SummerOfCode/2014/Projects