Counterparts Lite is a string-table editor for Mac and iOS app developers and translators of those apps
It shows your string table as a grid you can navigate and edit with keyboard shortcuts and rearrange by dragging rows. It also let you select a reference file displaying it in a side-by-side view suitable for translating an existing file, with a convenient filter to spot quickly missing translations.
Counterparts Lite opens ".strings" files, including binary (compiled) ones.