Bootstrap Zero - Open-source, free Bootstrap templates collection.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Bootstrap Magic - Create your Bootstrap 4.0 themes easily with magic
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Cruip - Landing page templates for startups
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats