As I type this on Tuesday night, your Houston Texans have not (publicly) done anything in free agency.
Brice McCain and Owen Daniels have been cut. Antonio Smith, Ben Tate, and perhaps Garrett Graham are talking to other teams. Earl Mitchell, Bryan Braman, and Joe Mays have already signed with teams not based in Houston, Texas. Josh McCown, a player the Texans were reportedly interested in enough to coordinate a visit, opted to sign with Tampa Bay before ever coming to Houston to talk about possible employment.
And Matt Schaub remains a Texan. For a good read on why that could be the case, I recommend this article by Sean Pendergast.
Day Three of the 2014 NFL Free Agency period is here. Comment to your heart's content about any news, rumors, or rumored news in this open thread.
For an up-to-the-minute list of free agent signings across the NFL, check out SB Nation's Free Agent Tracker.