This is an open debate, everyone is welcome to post here given that the post is constructive. Use some points to support your poll choice.

In other words, please do not post something like "WinRAR Rules!", "I support WinZip", "7-Zip better la!" or anything else along those lines. Warning will be given to repeat offenders.

Your judgement can be made from:
- Compression formats supported
- Compression ratio
- Cost
- User Friendliness
- User Interface
- Other features (e.g, splitting, skin support etc)

For homepage/download links of those compression software, please visit here

I used to use WinRAR, but my vote now goes to 7-zip

It might not be the fanciest piece of software in comparison to WinRAR, Winzip etc, and the formats supported are not as many as WinRAR, but still I vote for 7-Zip because of the following reasons:

- It is FREE, I can use it without having to pay a single cent and without any guilt

- 7-Zip supports popular compression formats such as .zip, .rar, .tar.gz, bzip, arj etc. Winzip on the other hand doesn't support RAR yet

- .7Z using LZMA algorithm is the most compressed format despite the relatively longer compression time, which is not my main concern. I have a 21MB folder stored with excel spreadsheets, when I compressed it to .RAR using WinRAR, the file size is 6378KB, when I compressed it to .7Z using 7-Zip the file size is only 3881KB...this is a big difference.

- Powerful Command Line support

This is why the choice "Others" comes into the picture
There is only 10 poll choices allowed

As mentioned, I am only able include 10 poll choices
It is unlikely for me to add in all the minnows while dropping some of the big names such as winzip and winrar. So I don't see anything wrong with it.

I hope the discussions should be focused on what is your favourite compression software and why, instead of posting "Why this is not included?, Why that is not included?". We are talking about the best, not the rest

And always remember there is a last choice - Others (Please stated) --> I don't see anyone voted this yet either.

Ah yes...In case you didn't notice, ZipGenius is one of the choices

Obviously winrar pwns all the other competitors because of formats supported and user friendly interface

But if you guys are going to archive large amount of big files, I would rather recommend 7zip because 7z is highly compressed and will save a lot of disk space

Get version 4.2 here
http://www.7-zip.org/

Yes, RAR does have higher compression rate in comparison to .zip, but .7z is still the most compressed format