File Compression

FreeDMG
Kelleycomputing(Free)
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FreeDMG: Drag and drop disk imaging on the fly
Express Zip Mac Compression Software
NCH Software(Trial version)
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Express Zip Mac Compression Software
Smart Zipper Pro
EffectMatrix(Trial version)
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Smart Zipper Pro for Mac - Efficient File Compression Software
Flash Optimizer
Eltima Software(Trial version)
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Reduce compression time for SWF files without losing quality
YemuZip
Yellow Mug Software(Free)
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Efficient File Compression with YemuZip for Mac
Doxillion Free Mac Document Converter
NCH Software(Free)
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Doxillion Free Mac Document Converter
BetterZip
Macitbetter(Trial version)
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BetterZip: Compress zip and tar archives
iZip
iZip(Free)
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iZip: Unzip and compress ZIP, RAR, and ZIPX files
DMG to ISO Converter for Mac
Aolor Software Co., Ltd.(Trial version)
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Best DMG to ISO Converter for Mac Users
StuffIt Deluxe
Smith Micro(Trial version)
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StuffIt Deluxe for Your Stuff