7-zip is a good choice. To install on n900, Step 1: activate Extras-testing Application manager --> Application catalogs --> New Catalog name: maemo.org extras-testing Web address: http://repository.maemo.org/extras-testing Distribution: fremantle Components: free non-free Step 2 : Open x terminal Step 3 : 'sudo gainroot' Step 4: 'apt-get update' Step 5: 'apt-get install p7zip-full' now 7-zip is installed into the n900 To extract files, open the terminal and type '7z e test.zip' check following link to find complete command line options of 7z - http://dotnetperls.com/7-zip-examples