BILLYFUSTER  This is a fantastic and essential editor for anyone working with XML and its related technologies (XSLT, XQuery, XML Schemas, RelaxNG, DTD). If you work with TEI, DocBook, or DITA, oXygen ships with up-to-date versions of these schemas and templates. oXygen natively understands (and learns) XML structures, so you'll notice it suggesting element and attribute values as you edit. It's also an excellent XHTML, CSS, and plain text editor. Its built-in ability to browse and query native XML databases (such as eXist and Mark Logic), SQL databases, and SVN repositories make it a tool for the power user.

While Java-based and thus visually non-Mac in UI, the developers are listening to the requests of mac users in their forums. Like many specialized tools, oXygen's many views and palettes let you customize your UI to expose only what you need to get your job done.

Lastly, don't let the price scare you away! There price listed here is for the professional commercial license. The personal/academic price is much lower (currently $48). The fact that this license is cross-platform means that if you have a windows machine you can install it there too and get work done.

Since I purchased in November, two point releases have come out - 9.2 and 9.3 - and I've been impressed with the steady progress they've made. 9.3 is able to open MS Office XML files in their zipped state from within oXygen. They're also adding more options for WYSIWYG-like XML editing, which make it nicer to edit XML files (and to train XML newbies to edit XML files).

My only problem cropped up when I began editing a fairly large XML file - I started getting out of memory errors. This was solved by a quick edit of a config file (oxygenmac.sh) in the oxygen directory... Java apps apparently can't adjust their memory as needed as native mac apps can. But the steps for doing this were well laid out in the included documentation.  
(Version 9.3)

NEDRON  This is arguably the best XML editor I've used for a number of reasons.

I had previously used Emacs (via psgml) for most of my needs, but occasionally tried GUI editors as they became available.

The first requirement is that it run on each platform I use (OS X, Linux, Solaris). Because it is Java-based, will run on any platform that has a native Java interpreter.

Additionally, the built-in templates for various schemas make it incredibly easy to create new documents, etc. Particularly of interest to me, since much of what I do is documentation, is 's DocBook integration.

Also of note is the new inline checking, etc.

The price seems high to some, but given that the license includes the right for me to run it on any Java-enabled platform, the price is very good.

I've rarely purchased an app where I had no regrets about some portion of the product I purchased. is one such app which I can recommend wholeheartedly.  
(Version 7.0)

ANONYMOUS  Oxygen may be a full featured XML editor, but I think they have spent a lot of time making an editor than can handle multiple file types versus an all around excellent XML editor.

I am used to XMLspy, on windows, and a coupld features it has Oxygen would be well advized to implement. The tree view in XMLspy for instance is lightyears ahead of Oxygen's.

Over all, for a crossplatform XML editor, it's great thought. Mostly minor things, and the speed could use a boost as well.  
(Version 2.0.4)

MATHIAS WIEGARD  Sorry. I don't understand the prior review. Oxygen has the best price/value-relation U can get for a full (yes, full!!) xml-editor. It supports dtd, xml schema, xsl-fo and has an excellent structure recoginition. It also has code-completion, auto-formatting features, it has a tree-editor and it's multi-lingual. U can easily manage complex projects. And I HAVE complex projects to do. For Mac-User who want to do XML it's a must. For everyone else, who don't like to spend a hundreds of bucks for an XML-editor it's the first choice, too.  
(Version 2.0.1)

153957  eeeh, not that usefull...  
(Version 2.0.1)