steam
I remember there being a button to view a list of all the guest passes and gifts you've sent to people on Steam, but it seems to have disappeared after the Steam inventory update.
Is it still there, in a different place, or was it removed completely?
You haven't uploaded the screenshot yet, so it won't be on your profile. in Steam's main menu, click on "View" -> "Screenshots".
You can then pick the game to show at the top, and that will show all the screenshots you've ever made in that game, uploaded or not.
In your library list, right click on the game you wish to cancel the download for and click 'Delete Local Content'. This will remove the data that has already been downloaded and remove the game from the download list.
Best Answer
There is absolutely a way to see who you have sent gifts to in the past:
Voila! You should be met with a screen that looks a little something like this: