7-Zip vs Far Manager
When comparing 7-Zip vs Far Manager, the Slant community recommends 7-Zip for most people. In the question“What are the best free file managers for Microsoft Windows?” 7-Zip is ranked 4th while Far Manager is ranked 6th. The most important reason people chose 7-Zip is:
7-Zip is licensed under GNU LGPL, and the *.7z format has support across all major operating systems. There should be no trouble opening the archives under any operating system, and no need to deal with messages bugging you to register or pay for the app. Source code can be found [here](http://www.7-zip.org/download.html).
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Free and open source
7-Zip is licensed under GNU LGPL, and the *.7z format has support across all major operating systems. There should be no trouble opening the archives under any operating system, and no need to deal with messages bugging you to register or pay for the app. Source code can be found here.

Pro High compression .7z format
Their own file format .7z that ships with 7-Zip is one of the best compression formats. 7z file format is usually more compact than Zip.
Pro Lightweight
Starts quickly.
Pro Explorer right-click menu integration
Makes it easy to open any archive file, or create new archives, without having to go open another program first.
Pro Very fast compression/decompression
7z is muli-threaded, allowing it to do very fast compression and decompression.
Pro Unobtrusive
No nag screen.
Pro Keyboard-oriented
Far Manager's interface encourages keyboard operation - all actions are easily accessible with keyboard shortcuts, you can quickly record macros for any repeatable action, there are no screen redraws if it is not necessary and that makes everything faster.
Pro Open source
Released under BSD license.
Pro Two-panel interface
Pro Many plugins
There are may of them, and you can write them in any languages, including Python.
Pro Editor with syntax highlighting
Every Far feature is also true for its editor. You can setup an external editor if you like, but the included editor works really well and features syntax highlighting.
Pro Easily recorded macros
Hit "Ctrl-." and start recording your boring sequence. Hit "Ctrl-." again to assign it a key. You can use Lua if you need more advanced macros.
Pro Numeric sorting option
E.g. readme-9.txt before readme-10.txt
Pro Extremely fast
Pro Offline context help
Just press F1 when you need it. No internet connection or browser is required.
Pro Themeable
Fully themeable, allowing you to change the colors of every part of the interface.
Pro Scrippting support via LUA
Cons
Con GUI looks dated
Could use a new fresh user interface.
Con XZ/LZMA2 format inadequate for long-term archiving
LZMA2 is unsafe and less efficient than the original LZMA. Use: 7Z LZMA Non-Solid, RAR 5 LZSS/PPMd Non-Solid, or ZIP Deflate. See here.
Con Does not support data recovery
It's not possible with 7-zip to add data recovery records to the archive which could repair minor integrity errors.
Con Blocking operations
Operations such as copy, move, delete, etc are blocking, and you have to wait for them to complete before you can continue.
Though you can cancel the operation with the escape key.
Con Only for Windows
Con Always uses monospace font
Which makes long file names look extremely wide
Con Does not support scrolling with mouse
With plugin
Con Text-based interface
Far Manager does not use a GUI like most windows applications nowadays. This may prove difficult to use for people who are not familiar with text-based user interfaces.
Con Folder shortcuts not available in Alt+F1/F2 menus
