LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files

draw.io - Online diagramming application

IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.

yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.

IconViewer - Bot Productions's IconViewer utility allows you to view, copy, and save the icons in a file through its property sheet.