Voralent Antelope is a simple free software which rewrites JPEG, PNG and GIF images to reduce their size, without losing any image quality. The new Antelope has 2 compression mode. the 1st is loss less compression mode. the loss less mode can be compress without disturb your photo quality. Another one is lossy compression mode. In lossy compression mode, allowing you to reduce the file size than the loss-less mode, instead of not fully guarantee the quality.
What is new in this release:
Add Lossy compression mode for GIF format.
What is new in version 5.0:
Version 5.0 supports GIF Optimizer
What is new in version 4.2:
Version 4.2 adds PNG lossy compression mode.
.NET Framework 3.5