Picosmos Tools is described as 'Photoshop Nano. Simply, Picosmos Tools integrates picture browsing, editing, layout, frames, and cosmetic effects into one set. It also provides plenty of source material' and is an app in the Photos & Graphics category. There are four alternatives to Picosmos Tools for Windows, Linux and Mac. The best alternative is FastStone Image Viewer. It's not free, so if you're looking for a free alternative, you could try qimgv or Phiewer.
FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. It has a nice array of features that include image viewing, management, comparison, red-eye removal, emailing, resizing, cropping and color adjustments.
Ashampoo Photo Commander is an all-in-one application for organizing, editing, sharing and presenting photo collections. It also features additional creativity tools and audio and video management capabilities, making it a complete media management package.