Moom - Move your mouse over the green zoom button in any window, and Moom's mouse control overlay will appear (as seen in the above animation).
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Hammerspoon - This is a tool for powerful automation of OS X.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Spectacle App - Move and resize windows with ease.
Batch Image Processor 2010 - Batch-process & create web gallery of images