TOPCAT will provide you, the captain, with Load Sheets, Take-off and Landing Performance Reports including all relevant speeds (V1, VR, V2), de-rated and assumed temperatures and stop margins.
It is compatible with FSX, FS2004, and also with PMDG, LDS, Wilco feelthere.

Currently available Aircraft Types (more to come):
Airbus 320-214 (GE)
Boeing 747-400 (GE, RR, PW)
Boeing 747-400F (GE, RR, PW)
Boeing 767-300 (GE, RR, PW)
Boeing 767-300ER (GE, RR, PW)
Boeing 767-300F (GE, RR, PW)

TOPCAT Features:
- Microsoft