tribler offers anonymous torrent downloads

The easiest way to download using Tribler is to search from the search panel at the top of the screen. Just type in what you're looking for and press the ENTER button. You will be taken to the Results tab and your search results will start coming in. When you've found what you're looking for you can click the Download button directly or first click on the search result to examine it in detail and then click the Download button.

For a step by step introduction, see the example below:

Type Sintel in the search bar and click on the Search button; (Visit the Sintel website for more information about the movie.)
The results view should come forward and give you a number of results. One of them should be named Sintel. You can now click the download button to the right.
Tribler will now gather information about the torrent. When this is completed, you will see a list of files in the torrent. Optionally, you can select or deselect files for downloading.
You then have to select a location where to place the file. Click DOWNLOAD when you're satisfied with the location;
The file now starts to download and will be visible in the downloads tab. Notice that you see the current progress here. This will tell you how much has been downloaded, how large the file is and how much time it will take at the current downloading speed.
Tribler allows you to watch videos while they are being downloaded. When you download a video, the streaming button appears at the top of the screen. When clicking this button, you will go to the video player and the video will play. If you have a slow internet connection, the video might shutter when being played.