PeaZip is a cross-platform file archiver utility that provides a unified portable GUI for many open source technologies like 7-Zip, FreeArc, PAQ, UPX, etc. Creates 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, and ZIP files. It extracts more than 150 archive types: ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX, and more. Features of PeaZip include extracting, creating, and converting multiple archives at once, creating self-extracting archives, split/join files, strong encryption with two factor authentication, an encrypted password manager, secure deletion, find duplicate files, calculate hashes, and export job definitions as scripts.
Many times, developers (or even, normal users) run into an issue of searching for a resource that is inside a zip. Worse, sometime the resource is inside a zip that is itself inside another zip (i.e. a nested archive). zfind solves this problem. It is very fast and works on most common archive/compress files. It support full name search as well as regular expression search. Apart from command line usage, it also provides API support that lets you use it in your Java code as a 3rd party library.
copymon provides file copying processes with a progress bar. Neither cp nor rsync provide means to monitor the copying process, nor a progress bar. copymon is a wrapper which performs a scan of the directory to be copied and collects information about the files to be copied. After that, it spawns the actual copying program (which can be cp, rsync, or tar) and monitors its progress. copymon can be easily enhanced to support more programs and can be extended to provided different types of progress bars.