Today is the last day of the transfer window. Transfers must be completed by 11:00 PM GMT/5:00 PM Central. Some big names so far of this window:

Mario Ballotelli - AC Milan bought him from Man City for £17m
Wilfried Zaha - Bought by ManUtd for £10m + £5m add-ons from Crystal Palace, then loaned back to Crystal Palace for the rest of the year
Nuri Sahin - On loan from Real Madrid, Liverpool have terminated the loan and returned him. RM have already loaned him to Borrusia Dortmund for 18 months.
Chris Iwelumo - Loaned from Watford to Oldham. I only mention him because he's considered to have done the greatest miss in recent soccer history. (Fast-forward to 30s for fantastic Scottish commentary)

httpv://youtu.be/59sG34Nx-DY

Newcastle have signed a slew of Frenchmen, leading to all manner of terrible jokes, and QPR has been very active because of the wheelings and dealings of Harry "Don't Call Me A Wheeler-Dealer" Redknapp.

httpv://youtu.be/xJBsI7RAuvk
(NSFW Langauge)

It's also rumored that PSG will announce signing David Beckham. Press conference in a few hours.

Big moves for Citizens' Teams

Fulham
Urby Emanuelson - On loan from AC Milan for the rest of the year
Emmanuel Frimpong - On loan from Arsenal for the rest of the year
David Stockdale - Out on loan to Hull
Stephen Kelly- To Reading on Undisclosed terms

Spurs
Lewis Holtby - From Schalke in the Bundesliga for £1.5m
Zeki Fryers - from Liege in Belgium for £3m

Everton
Anton Forrester - Left for Blackburn Rovers on a free transfer
Ross Barkley - Loaned out to Leeds

Chelsea
Demba Ba - In from Newcastle
Daniel Sturridge - Out to Liverpool
Assorted other minor loans

Sunderland
Fraizer Campbell - Sold to Cardiff City for a rumored £650,000
Danny Graham - Bought from Swansea for £5m
Alfred N'Diaye - Purchased from Bursaspor (Turkey) for an undisclosed sum
Kader Mangane - Brought in on loan from Al Hilal (Egypt)

In non-English transfers

Wesley Sneijder - The Ducch international has moved from Inter Milan to Galatasaray (Turkey) for a rumored £8.4m.
Giuseppe Rossi - Joined Fiorentina from Villarreal for £8.1m
Nicolas Anelka - At AC Milan onsix-month loan from Shanghai Shenhua
Kaka - AC Milan are rumored to want him back from Real Madrid
Pato - The Brazilian has left AC Milan to return to Brazil and has signed with Corinthians
Fernando Llorente - Has agreed to join Italian champions Juventus on a free transfer when his contract at Athletic Bilbao expires this summer.
Drogba - Galatasaray bid to sign Didier Drogba from Shanghai Shenhua. He's currently on duty for the Côte d'Ivoire in the African Cup of Nations