As of right now and until April 22 you can download these from PSN completely free of charge. You don't need a PS+ membership and are yours to keep.
Some good stuff:
ABZÛ
Enter the Gungeon
Subnautica
The Witness
Some VR crap:
Astro Bot Rescue Mission
Moss
Paper Beast
Rez Infinite (works without VR)
Thumper (works without VR)
You can also download Ratchet & Clank (2016) until March 31, and Horizon Zero Dawn will be briefly available starting April 19.
Some good stuff:
ABZÛ
Enter the Gungeon
Subnautica
The Witness
Some VR crap:
Astro Bot Rescue Mission
Moss
Paper Beast
Rez Infinite (works without VR)
Thumper (works without VR)
You can also download Ratchet & Clank (2016) until March 31, and Horizon Zero Dawn will be briefly available starting April 19.