The .ipk file extension is most commonly associated with the Debian software installation packages. The IPK files contain compressed file archives that are derived from DEB files. These files are used to install software on hand-held devices.
The .ipk file extension is also used for Internet package files, Nintendo DS packed image files, NRG iPack files, Sharp Zaurus PDA application install files and Palm WebOS files.
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If you have additional information about the IPK file format or software that uses files with the IPK suffix, please do get in touch - we would love hearing from you.