In order to edit OFP you need tools and utilities. Main categories are as following. Islands: WrpTool. Models: Oxygen 2 Light (O2). Textures: TexView. PBOs: PboX. Optimizing models: Binarize.

Binarize

Oxygen 2

Oxygen Viewer / Buldozer

TexView

Pal2PacE

Visitor 2

Wave2lip

BinView by CoC

CfgCheck by vektorboson

GateBuilder by bxbx

ODOL Explorer by PMC

P3DEdit by ofpinternals

P3D Texture Swap Utility by Mike Schell

PaaTool by feersum.endjinn

PAnTool by Dschulle

PboX by PMC

png2pac by feersum.endjinn

TexReplacer by vektorboson

TGA2ASE by kegetys

TxtPathSwap by feersum.endjinn(?)

Wilbur

WrpEdit by ofpinternals

WrpTool by PMC

wssfileconverter by Stoppelhopser

WrpUtilEx by Dschulle

xPack by a-lone-wolf

Oxygen2 and Binarize check Bohemia Interactive breathe page.

Command Reference download from BIS page.

Briefings by BIS download from BIS page.

TexView v1.1 to edit textures download from BIS page.

BIS sample models in MLOD format download from bis page.

Binarize v?? download from BIS page.