This post was originally published on February 20th 2011, since new documents are still added, I make a duplicate to put it back to the top:
IFR:
- EU OPS (accurate at this date)
(eng)
(fr) - IR knowledge summary (91p)
(fr) - official DGAC revalidation test form
(fr) - Jeppesen Enroute Chart Legend (intro ONLY)
(eng)

- IFR practices courses
(fr) - revalidation course guide (EPAG type)
(fr) - IFR nav log (EPAG type, my favourite so far ^^)

- IFR journey preparation (ESMA type)
(fr)
VFR:
- Visual Flight Rules (2009)
(fr) - VFR reminder
(fr) - Airspace class, ground/air, tower/air, interception signals reminder (very useful!)
(fr) - QNH, QFE, FL (a brief reminder)
(eng)
Misc:
- B737 500 IRS FMS (‘can’t remember where I got that!)
(fr) - Meteo aviation guide (*UPDATED* Meteo France file 2011-2013)
(fr) - G1000 manual (DA42)

- G1000 DA42 virtual training program

- GNS 430 Trainer (a program)

- GARMIN 400 Series Trainer (another program)

- Licenses validity/revalidation conditions reminder
(fr) - virtual log book (automatic hours counting! -courtesy B.L-)

- detailed log book (excel file courtesy S.G!)

- blank flight plan

- How to fill a flight plan
(fr) - BIA exam (full feedback, 2004 test questions + answers!)

- QCM for ULM test (training program – 878Q)
(fr)
(updated 18/02/2012) As usual if you have anything to share with us you know the door.