Ark - Manage Archive Formats

Open Source Archiving Tool

Ark is a program for managing various archive formats within the KDE environment. Archives can be viewed, extracted, created and modified from within Ark. The program can handle various formats such as tar, gzip, bzip2, zip, rar and lha (if appropriate command-line programs are installed). Ark can work closely with Konqueror in the KDE environment to handle archives, if you install the Konqueror Integration plugin available in the kdeaddons package.

Conduit - Open Source Sync Tool

If you’re using GNOME, Conduit is an open source app that allows the user to synchronize information to and from various destinations. This is an open source file synchronization tool synchronizes files, photos, emails, contacts, etc to another computer or device.

Catfish

Open source File searching tool

Catfish is a versatile file searching tool. Catfish is a search GUI powered by locate and find behind the scenes, with auto-completion from Zeitgeist and locate. The advanced options allow filtering by date and file type. The interface is intentionally lightweight and simple, using only GTK+.

Regain - Open Source Search Tool

Search the contents of your files not just the file names. Regain is a search engine similar to web search engines like Google, with the difference that you don't search the web, but your own files and documents. Using regain you can search through large portions of data (several gigabytes!) in split seconds! This is possible by using a search index. regain crawls through your files or webpages, extracts all text and puts it in a smart search index. All this happens in the background. So if you want to search something you get the results immediately.