Cut&Slice me is a free Photoshop plugin that can be used for exports your layers and makes precise slices. it takes some time to slice it and export all the assets to multiple image files.
Cut&Slice me cuts and exports them in png format trimming the pixels you don´t need, or let you can specify the size you want. Or you can export all states of your buttons in the blink of an eye.
When designing buttons, once the layers are named with the format mentioned by the plugin, it can auto-slice the multiple states of that button.
Cut&Slice me also can export to iPhone + Android retina/xhdpi (ldpi, mdpi and hdpi) with only one click.
Compatibility: Photoshop CS6+