Nestled in this article is a table showing the current cap space of all NFL teams:
http://espn.go.com/nfl/story/_/page/...ee-agents-2015
For those who want to cut to the chase, the Texans have $8.4 million in cap space at present. That ranks them 22nd in cap room. Teams in the negative (thus a better chance of poaching their players) are Pittsburgh, Miami, New England, Kansas City, San Francisco, Arizona and New Orleans.