ZipWrangler 

ZipWrangler allows you to manage .ZIP, .CAB and .LOK archive files. Compress your own archive files, extract files from downloaded archives; View/launch archive contents; span zips across multiple floppies; more. Free.
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Free PDF Compressor 

Compress PDF file and reduce the actual size of PDF document with this completely free PDF Compressor. Free PDF Compressor removes duplicate PDF objects, optionally takes advantage of new compression features of latest PDF specifications that for many classes of documents compresses 30 - 60% better than what is possible in PDF 1.5.
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Magic Image Resizer 

Magic Image Resizer is used to resize your digital photos and scanned pictures so you can put them on a web site or send over e-mail. It is designed to process several pictures at once and is very easy to use.
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