Most credit goes to Bleacher Report, I'll update this when I can.
Arizona Cardinals
July 26: The Cardinals have released inside linebacker Gerald Hayes. This move frees up $4.25 million in cap space. The Cardinals have replaced Hayes with a linebacker duo of Daryl Washington and Paris Lenon. Cardinals signed P Ben Graham to a new contract.
Atlanta Falcons
July 27: The Atlanta Falcons signed LB Stephen Nicholas to a five-year deal.
July 26: The Falcons signed Louisville QB Adam Froman. He will compete with John Parker Wilson to see who will be the third quarterback in Atlanta.
Baltimore Ravens
July 27: Signed LB Prescott Burgess to one-year deal.
July 26: The Baltimore Ravens released WR Derrick Mason, TE Todd Heap, NT Kelly Gregg and RB Willis McGahee. The moves were designed to free up salary cap space and remove contracts that were not good value. Ravens signed G Marhall Yanda to a five-year, $32 MM deal.
Buffalo Bills
July 27: The Buffalo Bills signed veteran CB Drayton Florence to a three-year deal worth $15 million.
July 26: The Buffalo Bills have lost free-agent LB Paul Posluszny, who signed a six-year deal to join the Jacksonville Jaguars. The Bills signed ex-Miami Dolphins QB Tyler Thigpen to a three-year contract.
Carolina Panthers
July 27: Signed LB Thomas Davis to a five-year deal. Signed LB James Anderson to five-year deal for $22 MM. Released K John Kasay.
July 27: The Panthers announced that they have signed K Olindo Mare to a four-year deal worth $12 million dollars.
July 27: The Carolina Panthers re-signed RB DeAngelo Williams to a five-year, $43 million deal that includes $21 mm guaranteed. The team also announced that they've signed TE Ben Harstock to a two-year contract.
July 27: Signed CB Cletis Gordon, S De'Von Hall and FB Richie Brockel to one year deals.
July 27: The Carolina Panthers signed former Chiefs DT Ron Edwards to a three-year, $8.25 million contract.
July 26: The Carolina Panthers re-signed Charles Johnson to a six-year deal for $32 million guaranteed with a $30 million signing bonus. The Panthers signed rookie undrafted free agents CB Kendric Burney and WR Darvin Adams.
Chicago Bears
July 27: Signed draft picks LB J.T. Thomas and QB Nate Enderle to four-year deals.
July 26: Chicago signed undrafted rookie free agents WR Dane Sanzenbacher and DT Corbin Bryant.
July 25: The Chicago Bears have told punter Brad Maynard they are going to release him.
Cincinnati Bengals
July 27: The Bengals have signed former Oakland Raiders QB Bruce Gradkowski to a two-year deal.
July 26: Cincinnati Bengals owner Mike Brown said Carson Palmer has retired. No other moves were announced.
Cleveland Browns
July 27: The Browns have released veteran QB Jake Delhomme.
Dallas Cowboys
July 27: Cowboys signed OT Doug Free to a four-year, $32 MM contract. Released T Robert Brewster. Signed C/G to a four-year deal.
July 26: The Dallas Cowboys have told G Leonard Davis, T Marc Colombo, RB Marion Barber, K Kris Brown and WR Roy Williams they will be released. These moves allow the Cowboys to have some room to maneuver and make some free-agent acquisitions.
Denver Broncos
July 27: The Denver Broncos traded WR Jabar Gaffney to the Washington Redskins in exchange for DE Jeremy Jarmon. Placed WR Demaryius Thomas on non-football I.R. list.
July 25: Denver told RB Correll Buckhalter he will be released. The move will become official on Thursday, July 28. The Broncos signed free-agent RB Mario Fannin.
Detroit Lions
July 27: Signed QB Drew Stanton to a one-year deal and signed S John Wendling to a three-year deal for $2.75 MM.
July 26: Detroit released WR Bryant Johnson. The move becomes official on Thursday, July 28. The Lions signed CB Brandon McDonald. Detroit also signed K Dave Rayner to a one-year contract.
Green Bay Packers
July 27: The Green Bay Packers signed K Mason Crosby to a five-year deal.
Houston Texans
July 27: Houston Texans signed WR Jacoby Jones on three-year, $10.5 MM contract, including $3 MM in guarantees. The team has also re-signed backup QB Matt Leinart to a two-year, $5.5 million dollar contract with $3.75 million guaranteed.
July 26: Houston Texans signed DL Damione Lewis. The Texans also signed undrafted rookie free-agent WR Terrence Toliver and OT Rashad Butler.
Indy Colts
July 27: The Colts have agreed to terms with S Melvin Bullitt. Same goes for K Adam Vinatieri (three-year deal).
July 26: The Indianapolis Colts signed QB Nate Davis to a two-year contract. The Colts also signed undrafted rookie free-agent S Joe Lefeged.
Jax Jaguars
July 26: The Jacksonville Jaguars have signed ex-Buffalo Bills MLB Paul Posluszny to a six-year deal.
KC Chiefs
July 26: The Chiefs agreed to terms with WR Terrance Copper on a three-year contract and with C Casey Wiegmann on a one-year deal.
Miami Dolphins
July 26: The Miami Dolphins signed undrafted rookie free-agent QB Pat Devlin.
Minnesota Vikings
July 26: The Vikings will trade a sixth-round pick in 2012 and a conditional sixth-round pick in 2013 to the Washington Redskins for QB Donovan McNabb. McNabb is expected to sign a reduced contract on July 27. Vikings signed WR Devin Aromashodu to a one-year contract. The Vikings also signed undrafted rookie free-agent RB Derrick Locke.
New England Patriots
July 26: The Patriots have told LB Tully Banta-Cain and CB Tony Carter they will be released. The moves will become official on July 28.
New Orleans Saints
July 26: The New Orleans Saints signed undrafted rookie free-agent S DeAndre McDaniel.
NY Giants
July 26: The New York Giants signed G/C Kevin Boothe to a two-year contract. The Giants released OT Shawn Andrews, restructured the contract of DT Rocky Bernard and signed undrafted rookie free-agent LB Mark Herzlich.
NY Jets
July 26: The New York Jets agreed to terms with OT Wayne Hunter on a four-year, $13 million contract.The Jets report that OT Damien Woody has decided to retire.
July 27: The New York Jets have agreed to terms with WR Santonio Holmes on a four-year, $24 million guaranteed deal that could be worth as much as $50 million over the lifetime of the contract.
Oakland Raiders
July 27: The Raiders re-signed veteran long snapper Jon Condo to an undisclosed deal.
July 26: The Oakland Raiders signed DE Jarvis Moss to a one-year, $1.25 million contract.
Philly Eagles
July 26: Philadelphia Eagles signed undrafted rookie free-agents RB Noel Devine, WR Perry Baker, WR DeAndre Brown, RB Graig Cooper, P Chas Henry, QB Jerrod Johnson, LB Brandon Peguese, DT Cedric Thornton, WR Terrance Turner and TE Martell Webb.
Pittsburgh Steelers
July 26: The Pittsburgh Steelers have signed undrafted rookie free-agent RB John Clay. The Steelers signed CB Ike Taylor to a four-year contract.
San Diego Chargers
July 27: The Chargers have re-signed safety Eric Weddle to a multi-year contract making him the highest paid at the position in NFL history. The team also signed second round pick Jonas Moutan to a four-year deal. Chargers will release WR Craig Davis.
July 27: Chargers signed the following 19 rookie undrafted free agents: Arizona C Colin Baxter, Texas Tech LB Bront Bird, Auburn DE Mike Blanc, Arkansas CB Ramon Broadway, Maryland WR Adrian Cannon, South Carolina FB Patrick DiMarco, Georgia LB Darryl Gamble, TCU DT Kelly Griffin, Washington T Cody Habben, Kansas State CB Stephen Harrison, Cincinnati WR Vidal Hazelton, Oklahoma WR Cameron Kenney, Minnesota-Duluth RB Isaac Odim, Colorado WR Travon Patterson, Boston College DE Damik Scafe, Whittier WR Giovanni Stanley, Baylor TE Brad Taylor, Oregon T Bo Thran and Wisconsin QB Scott Tolzien
July 26: The San Diego Chargers signed LB Takeo Spikes to a three-year contract, TE Randy McMichael on a one-year $910,000 contract and T Jeromey Clary on a four-year $20 million deal. The Chargers released OLB Jyles Tucker and WR Buster Davis.
SF 49ers
July 26: The San Francisco 49ers signed QB Alex Smith to a one-year, $5 million contract. The 49ers also signed undrafted rookie free agent NT Ian Williams.
Seattle Seahawks
July 27: Ex-Seahawks QB Matt Hasselbeck signed a deal to join the Tennessee Titans. The team also signed former Oakland Raiders guard Robert Gallery to a three-year deal.
July 26: The Seattle Seahawks signed ex-Minnesota Vikings QB Tarvaris Jackson for a two-year deal worth $8 MM. Seattle announced RB Edgerrin James has announced his retirement.
St. Louis Rams
July 26: St. Louis Rams signed ex-Philadelphia Eagles safety Quintin Mikell to a four-year, $27 million contract with $14 million guaranteed.
Tampa Bay Buccaneers
July 27: Tampa Bay signed DE Adrian Clayborn on a multi-year contract.
July 26: The Tampa Bay Bucs have not made any formal moves in free agency, but did sign two of their draft picks, LB Mason Foster to a four-year contract and TE Daniel Hardy to a four-year contract.
Tennessee Titans
July 27: Titans signed ex-Seattle Seahawks QB Matt Hasselbeck to a multi-year deal.
Washington Redskins
July 27: Washington Redskins have signed veteran WR Brandon Stokley to a one-year deal.
July 27: The 'Skins have also signed former New York Jets QB Kellen Clemens to a one-year deal.
July 27: Washington signed ex-New York Giants DT Barry Cofield on a six-year contract. Also, the Denver Broncos traded WR Jabar Gaffney to the Washington Redskins in exchange for DE Jeremy Jarmon.
July 26: The Washington Redskins have signed WR Santana Moss to a three-year, $15 million contract, including a $5 million signing bonus. Redskins released P Josh Bidwell. Redskins traded QB Donovan McNabb to the Minnesota Vikings for a sixth-round pick in 2012 and a conditional sixth-round pick in 2013. McNabb will be required to sign a reduced contract with Minnesota on July 27.