Free
Convert many archives in many other archives
AutoZIP II is free and the world's #1 Feature Rich compression utility.
Zipghost - Batch compression and Batch decompression utility.
Unrar files - free tool to quickly decompress RAR-archives.
windows utility for file compression & extraction by easy Drag and Drop
ToolsGround Split PST Program - to divide PST file by size, folder, and year
Compress multiple files into ISO files.
Free file archiver utility, open 7Z ISO TAR RAR ZIP ZIPX archives (150+ formats)