If you are looking for something to read that says the Minnesota Vikings will sign Antonio Brown, Jadeveon Clowney, or Colin Kaepernick, this is not it. Those are fun to talk to about but are unlikely to come to fruition.
The Vikings are said to have about $13 million under the salary cap in remaining funds. That allotment leaves room for a few (or one noteworthy) acquisitions if the team decides it wants to bolster some areas of the depth chart.
Decent options do exist on the current free agent market, if only to prop up depth or encourage positional battles.