During the Credits
There are pictures of the Eidos Montreal team over the years they worked on Human Revolution shown alongside the credits.
After the Credits
There is an extra scene after the credits, check out more details, spoilers, and video of the extra scene below.
The extra scene involves Bob Page, a wealthy philanthropist and member of the Illuminati, talking to Megan Reed about moving forward with the nanite-virus hybrid project which results in the building of the original games protagonist, JC Denton. There is also an achievement/trophy unlocked for waiting through the entire credits called “The D Project” and the original Deus Ex song plays to officially end the credits.