Hot on the heels of Mega Man 9 & 10 being given away free for PlayStation Plus members (ok, a month later), it has now been revealed that Mega Man Maverick Hunter X will be the next free digital offering. It will be available tomorrow, February 19th. The game is currently compatible with the PSP, PSP Go, and PS Vita. As a reminder, PlayStation Plus free games and discounts must be claimed within a specific span of time. However, any free games received through the program will continue to work as long as you have a working PS Plus subscription, which can be renewed at any time even after your initial subscription expires.
Here's the usual PR:
An enhanced remake of the classic Mega Man X, complete with 3D character models, remixed music, and all new unlockable features, this is classic Mega Man turned up to 11. When Sigma leads a group of Reploids in a revolt against mankind, it’s up to X and Zero to protect the world from ruin. You can download this title free as a PS Plus member and play it on your PS Vita, or PSP.
Source: PlayStation Blog