BioWare has announced that they will be hosting another "Weekend Pass Free Trial" this weekend, which will allow you to check out Star Wars: The Old Republic for free.
So far, the game has been doing rather well for BioWare and Electronic Arts, even if the did manage to lose 400,000 subscribers recently. There has been a constant stream of updates, and everything suggests that BioWare has managed to justify the rather lengthy development time for the game.
BioWare has stated that to enjoy the Free Trial weekend, you will not need to use any credit card details at all, and you can play for the entire duration of the promotion. During this time, you'll be able to experience the first 15 levels of the game, explore the Origin Worlds and even your faction's Capital World.
For more information, please feel free to check out the official post on BioWare's website. If you haven't managed to check out the game so far though, there's no time like this weekend. The trial will start on the 17th of May at 5:01am GMT and end on the 21st of May at 7:00am GMT.
Source: SWTOR Official Site