IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files
Icon Converter by RedKetchup - Convert a PNG, JPEG, WEBP, HEIC, GIF, TIFF, BMP, or SVG image to the ICO format. Customize the icon background and rounded corners. Create a compatible Windows ICO file from an image.
IconViewer - Bot Productions's IconViewer utility allows you to view, copy, and save the icons in a file through its property sheet.
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Thumbico - Thumbico displays and allows saving the thumbnail or icon of any file, image, document, video or...
png2ico - Program to convert .PNG files to a Windows icon resource, such as used for website/bookmark icon favicon.ico. Available for different platforms.