Kaleidoscope spots differences in text and image files.

Features
General

• Single window workflow: One tab per comparison
• Compare two+ files: Add any number of files per tab
• Always up to date: Auto-refreshes when files change
• File Shelf: Quickly go from file to file
• Path Bar: See where your files are
• Keyboard shortcuts: Every action has a shortcut

Text Scope

• Supports any text file: Plain text, source code, HTML, etc.
• Clear comparisons
• Three layouts: Blocks, Fluid, and Unified
• Compare documents: Imports text from .doc and .rtf files
• Instant search
• Change Stepper: Quickly jump from change to change
• Highlights: Added, deleted and changed text

Image Scope

• All popular image file formats: JPEG, TIFF, PNG, PSD and more.
• Four connected layouts: Two-Up, One-Up, Split, and Difference
• Comprehensive image support: RGB/CMYK/LAB, alpha, any size.
• Multi-touch support: Smooth scrolling and pinch to zoom
• Customizable environment: Change background color, difference mask and checkerboard settings
• Two difference mask modes: Spot absolute or relative changes

Integration

• Git, Mercurial, SVN, and Bazaar: Integrate with a couple of clicks
• Versions
• TextMate SVN
• Cornerstone
• ksdiff Command-line tool: Integrate with practically anything

What's New:

Version 2.4.2:

• Filter settings in the Folder Scope are now persistent
• Choosing "Open in Terminal" would silently fail
• Fix an issue where certain menu items would be disabled
• ksdiff would sporadically not work
• Fix a rare and rather obscure crash

Screenshots:

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