Acdsee was a long time ago a really good Windows applications for viewing images and almost everyone was using it, but then it became bloated and really slow, so i search for an alternative and tried a lot of them. FastStone Image Viewer is another great app from FastStone which is one of the best image viewers in my opinion. This little free application which also comes in portable version is a user-friendly image browser, converter and editor, all in just 3,9 mb.FastStone Image viewer has all the features you will need, like image modification tools: Resize/resample, rotate/flip, crop, sharpen/blur, brightness/contrast, red-eye removal, emailing, resizing, cropping, drop shadow, framing, bump map, lens, morph, waves, color adjustments and digital camera support but what i like the most is the built-in batch processing (you can rename or convert multiple images in the same time).
It also has common utilities for bloggers, like image special effects: watermark, annotation, and even a screen-capture utility. Just right click an image and click Draw-board to use annotations, arrows and such:
If you only want the batch processing, FastStone provides it as a stand-alone application and you can download it also for free: FastStone Photo Resizer:
Unfortunately, FastStone Image Viewer comes only in a Windows version, but if you really want to use it on Linux, the portable version works great through Wine.
