According to the story at Pro Football Talk, only 74 of their "Hot 100" free agents have been signed so far since free agency opened earlier this month. That means over 25% of that list remain unsigned and could be a pretty decent addition to anyone's roster, including the Baltimore Ravens.
The list includes both unrestricted as well as restricted free agents, so guys like the Ravens' Lardarius Webb and Pittsburgh Steelers WR Mike Wallace are on the list, although it will take a King's ransom to lure either away from their current teams. Ironically, both of these players are the top two remaining on their list.
A few of the interesting names on the list that could be a decent fit with Baltimore, depending on the saying, "right player, right price," include offensive tackles Marcus McNeill (San Diego Chargers) and Demetrius Bell (Buffalo Bills) and linebackers David Hawthorne (Seattle Seahawks) and London Fletcher (Washington Redskins). Another intriguing option for Baltimore might be former Ravens left guard Jason Brown (St. Louis Rams).