From Jean-Sebastien Guay, "I like the recent addition that adds folders in the solution tree to better organize the numerous examples, libraries, plugins etc.

I added two folders that were missing IMHO: packaging and documentation.
"

CMakeLists.txt

@@ -916,9 +916,12 @@ IF(BUILD_DOCUMENTATION)
     ADD_CUSTOM_TARGET(doc_openscenegraph ${DOXYGEN}
         ${PROJECT_BINARY_DIR}/doc/openscenegraph.doxyfile
     )
+    SET_TARGET_PROPERTIES(doc_openscenegraph PROPERTIES FOLDER "Documentation")
+    
     ADD_CUSTOM_TARGET(doc_openthreads ${DOXYGEN}
         ${PROJECT_BINARY_DIR}/doc/openthreads.doxyfile
     )
+    SET_TARGET_PROPERTIES(doc_openthreads PROPERTIES FOLDER "Documentation")
 ENDIF(BUILD_DOCUMENTATION)
 
 OPTION(BUILD_DASHBOARD_REPORTS "Set to ON to activate reporting of OpenSceneGraph builds here http://www.cdash.org/CDashPublic/index.php?project=OpenSceneGraph" OFF)

CMakeModules/OsgCPack.cmake

@@ -118,6 +118,8 @@ MACRO(GENERATE_PACKAGING_TARGET package_name)
     # Create a target that creates the current package
     # and rename the package to give it proper filename
     ADD_CUSTOM_TARGET(${PACKAGE_TARGETNAME})
+    SET_TARGET_PROPERTIES(${PACKAGE_TARGETNAME} PROPERTIES FOLDER "Packaging")
+
     ADD_CUSTOM_COMMAND(TARGET ${PACKAGE_TARGETNAME}
         COMMAND ${CMAKE_CPACK_COMMAND} -C ${OSG_CPACK_CONFIGURATION} --config ${OpenSceneGraph_BINARY_DIR}/CPackConfig-${package_name}.cmake
         COMMENT "Run CPack packaging for ${package_name}..."
@@ -127,6 +129,8 @@ MACRO(GENERATE_PACKAGING_TARGET package_name)
     ADD_CUSTOM_COMMAND(TARGET ${PACKAGE_ALL_TARGETNAME}
         COMMAND ${CMAKE_CPACK_COMMAND} -C ${OSG_CPACK_CONFIGURATION} --config ${OpenSceneGraph_BINARY_DIR}/CPackConfig-${package_name}.cmake
     )
+    SET_TARGET_PROPERTIES(${PACKAGE_ALL_TARGETNAME} PROPERTIES FOLDER "Packaging")
+
 ENDMACRO(GENERATE_PACKAGING_TARGET)
 
 # Create configs and targets for a package including all components