ComiXology just added two more titles to their "Free Comics" gallery. Here are the newest additions:
Winter Soldier #1
When ex-Russian Sleeper Agents awaken, Winter Solider and Black Widow head into action!
Avengers Assemble #1
The Avengers vs. the new Zodiac! One of the greatest Avengers villains gets reinvented for the Modern Age! A perfect jumping-on point featuring the cast of the summer blockbuster in Marvel Universe!