I've tried many resizes, but none did exactly what I wanted. I am sure you will enjoy ShipIt! as much as me.
ShipIt v1.0 MacOSX Retail-CORE
iOS Developers best friend! - UnRetina and Full Retina Package!!
Just drag and drop single files or multiple files. Drag Images to the icon in the dock for seamless use.
Add custom export templates for any mobile development.
UnRetina any image if you drag the @2x asset to the app.
Retina Package - Just drag ANY image and have it export the @2x asset and the non retina version. ** This is my favorite feature ** It saves me so much time.