Ibrahimovic is the big star of this line-up
On 30 June 2016 some footballers' contracts end. They are players whose club don't want to renew or that they refused to extend contract. With no links, they can choose destination and the new club don't have to pay any transfer.
In recent times, FC Barcelona has never used this option; we have to go back 10 years to find cases of Santiago Ezquerro and Van Bommel, the only two signings of the 2005/06 season. Previously, players such as Larsson and Giovanni van Bronckhorst arrived for free and they offered a good performance.
Regarding the situation of players who will be free within a few weeks, this is the XI with the most famous footballers who can sign for any team. It stands out for the presence of Zlatan Ibrahimovic, who has already announced that he will not continue in PSG next season. In the list there are also known players like Fernando Torres, who is playing a final season at Atlético Madrid, or two former Barça players like Arteta and Victor Valdés. However, it seems unlikely that FC Barcelona might be interested in some of these players.