TOM ANDERSEN  Developer here.

You can use Leap to tag files, but the real power lies in searching your files faster and easier than with Apple's tools.   
(Version 2.5.4)

CTKMND  $59 for a file tagging interface?

Did the US dollar take another drop or what?  
(Version 2.5.4)

NOVASTORM SOFTWARE  This is really an incredible app. I use it constantly throughout the day. I'd like to say though that I wish it could be better integrated into the open dialogs and such, so it would appear alongside save/open dialogs much in the way Default Folder X does. (a good complementary app by the way, since it allows you to apply OpenMeta tags while saving). Regardless though, once you get over the habit of putting things in folders and just start tagging everything, it really begins to feel natural. Five stars.  
(Version 2.5.2)

BUU-SAN  I bought LEAP in order to see if such a software is able to fit with the mess in my brain. Also, I have never read any document about "how to use" correctly this software.

For my brain, a good software should be able to be used intuitively. In that way, LEAP is not so bad.

But I found a complementary software to add tags more easily (Tags.app), by selecting 1 or several docs (email, pdf, image, ...) and pressing CTRL+Space for exemple, a Tag window appear and you can add your tags. They are recognized by LEAP also. That is really very convenient.

I use also Papers to organised my PDF files (list of publications). Papers is nice for bibliography (for scientists) as it generates a folder in which the PDF are classified by year, journals, authors, ... That is great and cheap.

But today, I made a big mistake combining Papers and LEAP, and I want to share this bad experience. I wanted to add tags on some PDF files in the Papers window. It did not work because the folder was not identified by LEAP. I could not really understand what does it mean.

LEAP : On the right side of your screen, you can find 3 options (tag, ?, file) to bring a doc/folder in LEAP. I was thinking that by draging the pdf folder into this window ("file", LEAP would be able to recognize the folder containing the pdf files that I want to tag from the Papers window.

I don't recommend you to drag the Papers folder in the "file" (managed ?) : I found all the PDF files renamed in LEAP and of course no more associated PDF on Papers. CTRL-Z was not working to repair this bad operation !

Then I decided to select the files from LEAP, and to drag it in Papers ! At that time, all the classification was lost, and even I could read all the PDF, the author and journal list was lost. Then I had to identify one by one each pdf and the associated authors/journal/year ... (about 2000 pdf files) !

So please never try this operation, or read "how to use LEAP" before trying any operation with important documents !

Hope this comment will be helpful !

  
(Version 2.5.0)

SCREENTOM  Great software. Great support. Thanks for the good job.  
(Version 2.0.1)

DONEBYLEE  I love Leap 2.beta and plan to purchase when 2 becomes official.

Only gripe is that I now wish I could REPLACE Finder with Leap. It would be great to have the Leap interface when I open folders and drives instead of Finder.

Oh well, I guess I will just have to retrain myself to always start in Leap. Unless someone knows of a way...???  
(Version 2.0b10)

FRANKEED  Odd that this software has "Leaped" from version 1.1 to 2.0. Sounds like they're trying to squeeze more money out of users who got Leap through the MacUpdate bundle last year.  
(Version 2.0b9)

CHRIS REED  I use Leap as a supercharged search engine.

Superb at letting me see the content of a stack of folders or narrow down the search to specific file types.

So a useful and unique complement for finder and Pathfinder.

I commented below, saying I was underwhelmed by Leap, so in fairness I have followed this up. I have to say this version seems much faster and less buggy, and like the comment below, with the plumbing cleaned out. I payed for the upgrade.

However, like other commenters, I found the spotlight comments location for tags and keywords did not work for me. I placed my own keywords in the spotlight comments using Hazel but Leap did not see them. I could see them in the Get Info box, but not Leap.

I am a visual thinker so file structure work for me. I can see the organisation. Tagging doesn't do it for me. I don't get it.

The tagging thing works for imported pdf's really well, but they are a small part of my HD content.  
(Version 2.0b7)

HMURCHISON  Leap 2.0 Beta is available here

http://www.ironicsoftware.com/beta/Leap_2.0b2.zip

It has redone plumbing and a freshened UI. It supports OpenMeta tags now

I've just downloaded it but it's only $19 to upgrade Leap 1.x and $29 if you want to get

Deep, Yep and Fresh with Leap 2.0.

Leap is quickly becoming a replacement for the finder for me once I get my tagging strategy down.   
(Version 1.1)

ANON BUD  I rather like this app. Granted, it has taken me a while to tag most of my files, but staying on top of things hasn’t been that difficult. I just make sure I tag a file after saving it and the rest just speaks for itself. I can find tagged files easily and this has helped me in my workflow a good deal.

When I first started using Leap, I used the option of integrating Leap’s tags with Spotlight comments. This was somewhat buggy for me and did not work very well. I’ve turned off this Spotlight comment option and things are much much better.

My only wish is that Leap would use the ”cloud-like“ (don’t know if that’s the right phrase) tagging that Yep uses. You know, where tags are sized according to the number of files associated with them? That would make this app visually more appealing to me.

Overall, very nice. I use it all the time, next to Finder.  
(Version 1.1)