Here is a list of all files with brief descriptions:

[detail level 1234]

Components
Overlay
include
OgreBorderPanelOverlayElement.h
OgreFont.h
OgreFontManager.h
OgreOverlay.h
OgreOverlayContainer.h
OgreOverlayElement.h
OgreOverlayElementCommands.h
OgreOverlayElementFactory.h
OgreOverlayManager.h
OgreOverlayPrerequisites.h
OgreOverlayProfileSessionListener.h
OgreOverlaySystem.h
OgrePanelOverlayElement.h
OgreTextAreaOverlayElement.h
Paging
include
OgreGrid2DPageStrategy.h
OgreGrid3DPageStrategy.h
OgrePage.h
OgrePageConnection.h
OgrePageContent.h
OgrePageContentCollection.h
OgrePageContentCollectionFactory.h
OgrePageContentFactory.h
OgrePagedWorld.h
OgrePagedWorldSection.h
OgrePageFileFormats.h	The paging file format is a composite one - a single file / stream can contain data which is not necessarily all read by a single class
OgrePageManager.h
OgrePageStrategy.h
OgrePaging.h
OgrePagingPrerequisites.h
OgreSimplePageContentCollection.h
Property
include
OgreProperty.h	OGRE's property system allows you to associate values of arbitrary type with names, and have those values exposed via a self-describing interface
OgrePropertyPrerequisites.h
RTShaderSystem
include
OgreRTShaderSystem.h
OgreShaderCGProgramProcessor.h
OgreShaderCGProgramWriter.h
OgreShaderExDualQuaternionSkinning.h
OgreShaderExHardwareSkinning.h
OgreShaderExHardwareSkinningTechnique.h
OgreShaderExIntegratedPSSM3.h
OgreShaderExLayeredBlending.h
OgreShaderExLinearSkinning.h
OgreShaderExNormalMapLighting.h
OgreShaderExPerPixelLighting.h
OgreShaderExTextureAtlasSampler.h
OgreShaderExTriplanarTexturing.h
OgreShaderFFPColour.h
OgreShaderFFPFog.h
OgreShaderFFPLighting.h
OgreShaderFFPRenderState.h
OgreShaderFFPRenderStateBuilder.h
OgreShaderFFPTexturing.h
OgreShaderFFPTransform.h
OgreShaderFunction.h
OgreShaderFunctionAtom.h
OgreShaderGenerator.h
OgreShaderGLSLESProgramProcessor.h
OgreShaderGLSLESProgramWriter.h
OgreShaderGLSLProgramProcessor.h
OgreShaderGLSLProgramWriter.h
OgreShaderHLSLProgramProcessor.h
OgreShaderHLSLProgramWriter.h
OgreShaderMaterialSerializerListener.h
OgreShaderParameter.h
OgreShaderPrerequisites.h
OgreShaderProgram.h
OgreShaderProgramManager.h
OgreShaderProgramProcessor.h
OgreShaderProgramSet.h
OgreShaderProgramWriter.h
OgreShaderProgramWriterManager.h
OgreShaderRenderState.h
OgreShaderScriptTranslator.h
OgreShaderSubRenderState.h
Terrain
include
OgreTerrain.h
OgreTerrainAutoUpdateLod.h
OgreTerrainGroup.h
OgreTerrainLayerBlendMap.h
OgreTerrainLodManager.h
OgreTerrainMaterialGenerator.h
OgreTerrainMaterialGeneratorA.h
OgreTerrainPagedWorldSection.h
OgreTerrainPaging.h
OgreTerrainPrerequisites.h
OgreTerrainQuadTreeNode.h
Volume
include
OgreVolumeCacheSource.h
OgreVolumeChunk.h
OgreVolumeChunkHandler.h
OgreVolumeCSGSource.h
OgreVolumeDualGridGenerator.h
OgreVolumeGridSource.h
OgreVolumeHalfFloatGridSource.h
OgreVolumeIsoSurface.h
OgreVolumeIsoSurfaceMC.h
OgreVolumeIsoSurfaceTablesMC.h
OgreVolumeMeshBuilder.h
OgreVolumeOctreeNode.h
OgreVolumeOctreeNodeSplitPolicy.h
OgreVolumePrerequisites.h
OgreVolumeSimplexNoise.h
OgreVolumeSource.h
OgreVolumeTextureSource.h
OgreMain
include
Android
OgreAndroidLogListener.h
OgreAPKFileSystemArchive.h
OgreAPKZipArchive.h
OgreConfigDialogImp.h
OgreErrorDialogImp.h
OgreTimerImp.h
FlashCC
OgreConfigDialogImp.h
OgreTimerImp.h
GLX
OgreConfigDialogImp.h
OgreErrorDialogImp.h
OgreTimerImp.h
gtk
OgreConfigDialogImp.h
OgreErrorDialogImp.h
iOS
OgreConfigDialogImp.h
OgreErrorDialogImp.h
OgreOSXCocoaTouchView.h
OgreTimerImp.h
NaCl
OgreConfigDialogImp.h
OgreErrorDialogImp.h
OgreTimerImp.h
OSX
OgreConfigDialogImp.h
OgreErrorDialogImp.h
OgreTimerImp.h
Threading
OgreDefaultWorkQueue.h
OgreDefaultWorkQueueStandard.h
OgreDefaultWorkQueueTBB.h
OgreThreadDefines.h
OgreThreadDefinesBoost.h
OgreThreadDefinesNone.h
OgreThreadDefinesPoco.h
OgreThreadDefinesTBB.h
OgreThreadHeaders.h
OgreThreadHeadersBoost.h
OgreThreadHeadersPoco.h
OgreThreadHeadersTBB.h
WIN32
OgreConfigDialogImp.h
OgreConfigDialogImpWinRT.h
OgreErrorDialogImp.h
OgreErrorDialogImpWinRT.h
OgreMinGWSupport.h
OgreTimerImp.h
Ogre.h
OgreAlignedAllocator.h
OgreAnimable.h
OgreAnimation.h
OgreAnimationState.h
OgreAnimationTrack.h
OgreAny.h
OgreArchive.h
OgreArchiveFactory.h
OgreArchiveManager.h
OgreAtomicObject.h
OgreAtomicScalar.h
OgreAutoParamDataSource.h
OgreAxisAlignedBox.h
OgreBillboard.h
OgreBillboardChain.h
OgreBillboardParticleRenderer.h
OgreBillboardSet.h
OgreBitwise.h
OgreBlendMode.h
OgreBone.h
OgreCamera.h
OgreCodec.h
OgreColourValue.h
OgreCommon.h
OgreCompositionPass.h
OgreCompositionTargetPass.h
OgreCompositionTechnique.h
OgreCompositor.h
OgreCompositorChain.h
OgreCompositorInstance.h
OgreCompositorLogic.h
OgreCompositorManager.h
OgreConfig.h
OgreConfigDialog.h
OgreConfigFile.h
OgreConfigOptionMap.h
OgreController.h
OgreControllerManager.h
OgreConvexBody.h
OgreCustomCompositionPass.h
OgreDataStream.h
OgreDDSCodec.h
OgreDefaultHardwareBufferManager.h
OgreDeflate.h
OgreDepthBuffer.h
OgreDistanceLodStrategy.h
OgreDualQuaternion.h
OgreDynLib.h
OgreDynLibManager.h
OgreEdgeListBuilder.h
OgreEntity.h
OgreErrorDialog.h
OgreETCCodec.h
OgreException.h
OgreExternalTextureSource.h
OgreExternalTextureSourceManager.h
OgreFactoryObj.h
OgreFileSystem.h
OgreFileSystemLayer.h
OgreFrameListener.h
OgreFreeImageCodec.h
OgreFrustum.h
OgreGpuProgram.h
OgreGpuProgramManager.h
OgreGpuProgramParams.h
OgreGpuProgramUsage.h
OgreHardwareBuffer.h
OgreHardwareBufferManager.h
OgreHardwareCounterBuffer.h
OgreHardwareIndexBuffer.h
OgreHardwareOcclusionQuery.h
OgreHardwarePixelBuffer.h
OgreHardwareUniformBuffer.h
OgreHardwareVertexBuffer.h
OgreHeaderPrefix.h
OgreHeaderSuffix.h
OgreHighLevelGpuProgram.h
OgreHighLevelGpuProgramManager.h
OgreImage.h
OgreImageCodec.h
OgreInstanceBatch.h
OgreInstanceBatchHW.h
OgreInstanceBatchHW_VTF.h
OgreInstanceBatchShader.h
OgreInstanceBatchVTF.h
OgreInstancedEntity.h
OgreInstancedGeometry.h
OgreInstanceManager.h
OgreIteratorRange.h
OgreIteratorWrapper.h
OgreIteratorWrappers.h
OgreKeyFrame.h
OgreLight.h
OgreLodConfig.h
OgreLodListener.h
OgreLodStrategy.h
OgreLodStrategyManager.h
OgreLog.h
OgreLogManager.h
OgreManualObject.h
OgreMaterial.h
OgreMaterialManager.h
OgreMaterialSerializer.h
OgreMath.h
OgreMatrix3.h
OgreMatrix4.h
OgreMemoryAllocatedObject.h
OgreMemoryAllocatorConfig.h	This file configures Ogre's memory allocators
OgreMemoryNedAlloc.h
OgreMemoryNedPooling.h
OgreMemoryStdAlloc.h
OgreMemorySTLAllocator.h
OgreMemoryTracker.h
OgreMesh.h
OgreMeshFileFormat.h
OgreMeshManager.h
OgreMeshSerializer.h
OgreMeshSerializerImpl.h
OgreMovableObject.h
OgreMovablePlane.h
OgreNameGenerator.h
OgreNode.h
OgreNumerics.h
OgreOptimisedUtil.h
OgreParticle.h
OgreParticleAffector.h
OgreParticleAffectorFactory.h
OgreParticleEmitter.h
OgreParticleEmitterCommands.h
OgreParticleEmitterFactory.h
OgreParticleIterator.h
OgreParticleSystem.h
OgreParticleSystemManager.h
OgreParticleSystemRenderer.h
OgrePass.h
OgrePatchMesh.h
OgrePatchSurface.h
OgrePixelCountLodStrategy.h
OgrePixelFormat.h
OgrePixelFormatDescriptions.h
OgrePlane.h
OgrePlaneBoundedVolume.h
OgrePlatform.h
OgrePlatformInformation.h
OgrePlugin.h
OgrePolygon.h
OgrePose.h
OgrePredefinedControllers.h
OgrePrefabFactory.h
OgrePrerequisites.h
OgreProfiler.h
OgreProgressiveMeshGenerator.h
OgrePVRTCCodec.h
OgreQuaternion.h
OgreQueuedProgressiveMeshGenerator.h
OgreRadixSort.h
OgreRay.h
OgreRectangle2D.h
OgreRenderable.h
OgreRenderObjectListener.h
OgreRenderOperation.h
OgreRenderQueue.h
OgreRenderQueueInvocation.h
OgreRenderQueueListener.h
OgreRenderQueueSortingGrouping.h
OgreRenderSystem.h
OgreRenderSystemCapabilities.h
OgreRenderSystemCapabilitiesManager.h
OgreRenderSystemCapabilitiesSerializer.h
OgreRenderTarget.h
OgreRenderTargetListener.h
OgreRenderTexture.h
OgreRenderToVertexBuffer.h
OgreRenderWindow.h
OgreResource.h
OgreResourceBackgroundQueue.h
OgreResourceGroupManager.h
OgreResourceManager.h
OgreRibbonTrail.h
OgreRoot.h
OgreRotationalSpline.h
OgreSceneManager.h
OgreSceneManagerEnumerator.h
OgreSceneNode.h
OgreSceneQuery.h
OgreScriptCompiler.h
OgreScriptLexer.h
OgreScriptLoader.h
OgreScriptParser.h
OgreScriptTranslator.h
OgreSearchOps.h
OgreSerializer.h
OgreShadowCameraSetup.h
OgreShadowCameraSetupFocused.h
OgreShadowCameraSetupLiSPSM.h
OgreShadowCameraSetupPlaneOptimal.h
OgreShadowCameraSetupPSSM.h
OgreShadowCaster.h
OgreShadowTextureManager.h
OgreShadowVolumeExtrudeProgram.h
OgreSharedPtr.h
OgreSimpleRenderable.h
OgreSimpleSpline.h
OgreSingleton.h
OgreSkeleton.h
OgreSkeletonFileFormat.h
OgreSkeletonInstance.h
OgreSkeletonManager.h
OgreSkeletonSerializer.h
OgreSmallVector.h
OgreSphere.h
OgreSpotShadowFadePng.h
OgreStableHeaders.h
OgreStaticFaceGroup.h
OgreStaticGeometry.h
OgreStdHeaders.h
OgreStreamSerialiser.h
OgreString.h
OgreStringConverter.h
OgreStringInterface.h
OgreStringVector.h
OgreSubEntity.h
OgreSubMesh.h
OgreTagPoint.h
OgreTangentSpaceCalc.h
OgreTechnique.h
OgreTexture.h
OgreTextureManager.h
OgreTextureUnitState.h
OgreTimer.h
OgreUnifiedHighLevelGpuProgram.h
OgreUserObjectBindings.h
OgreVector2.h
OgreVector3.h
OgreVector4.h
OgreVertexBoneAssignment.h
OgreVertexIndexData.h
OgreViewport.h
OgreWindowEventUtilities.h
OgreWireBoundingBox.h
OgreWorkQueue.h
OgreZip.h
src
OgreImageResampler.h
OgrePixelConversions.h
OgreSIMDHelper.h