We should be realistic about Adobe. I am sure they will never port to Linux (we should be happy that they released flash player at all)

For huge percent of replies are related to commercial packages requirements, I am going to mention some too:
I am quite satisfied with present capabilities of Linux in the context of CG. The high-end software produced for CG is initially ported to Linux; the best example is Autodesk's brilliant package kit Flame,Flint,Inferno,Smoke,Lustre, all along with Maya which was provided for Irix from the very beginning, and continued for RHEL. You wouldn't usually desire more with this - it's a complete collection, ready for a real motion picture.
And, of course, there are my favorites: Houdini and The Foundry's Nuke & Mari - amongst the most sophisticated software available today.

And there is actually a fine choice for video editing: Piranha HD (it has my vote for sure); but I just wait for http://www.lightworksbeta.com - finally they released it as open source - it is a great breakthrough, and it's just a matter of time when it's ready for Linux.

As for the open source, again, any CG Linux user could be satisfied in a way:
Blender is a giant, a bunch of free renderers and plugins; Inkscape can't really replace A.Illustrator in applied design, but in vector graphics it could beat it; Gimp is fine but not good enough for subtle users - it needs support for 16/32bit images and more options/optimizations - only then, it can compete with Photoshop; HTML editors are just fine - any professional web designer wouldn't need Dreamweaver as an ultimate application, all can be done with existent open source editors.

Finally, what I might miss here on Linux that other have on Windows is Vue infinite.

At the end, I am not concerned about the applications that are yet to be ported to Linux (it's all about when), but about those that are breaking off for good. Autodesk has started neglecting Linux, and we can expect more and more, not just from them (for instance, I am very disappointed by the late Songbird's breaking off with Linux).
After all, it's all about interests and capitalism - and we sure don't want that in our Linux society.

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A port of MS Visio, or a decent alternative. (and no dia is not a decent alternative)

SPSS (Statistical Programs for the Social Sciences) once ranked first with BMDP (BioMeDical Package). The fact that these programs evolved continously from the sixties up to date, says something about the appreciation of the users.
Yes SPSS and BMDP are the way to go. I am not able to make a choice.

Did you look at GNU PSPP, SocNetV and R commander?

I left out
http://dirk.eddelbuettel.com/quantian.html

I have to say WinHex by X-ways. None of the hex editors even come close to WinHex. Call it LinHex... maybe not.

I've been looking for a solid alternative to Adobe Lightroom for editing my photos, but the closest things I've managed to find are GIMP and darktable. It'd be nice to see Photoshop and the like be ported to GNU/Linux, but I really don't expect it to ever happen.

There was a multi-protocol IM client called Trillian I really liked on Windows 7, but it's not available for Linux. I use Pidgin instead, but it's not quite as nice as Trillian was.

Timesnapper

szboardstretcher, did you realize that Timesnapper is a .NET application? Have you tried running it under Mono?

I would like to see something like MS Onenote.

Basket is a very nice program, but cannot sync, so cannot open on a different PC.

I too would love to see Quickbooks or Quicken ported to Linux - not because they are great programs but for one and only one feature: the ability to download info directly from my bank into the program!

Linux has several excellent accounting/bookkeeping/check-book packages, but none which actually WORK without a lot of massaging to download from the various (incompetent) bank systems!

Emulating either Quicken or MSMoney "on line access" formats (NOT download a .CSV file from the bank website then manually enter it!) would work just fine. Forcing US banks to adopt the EU/German banking standard would work too, but would likely have a lot of NIH.

Google Sketchup. It works so-so on wine, but plugins are a headache.

ceedeedoos -- You might look at Gretl (http://gretl.sourceforge.net/). Looks like it can read SPSS files. It is a very powerful econometrics package.

Yes, it is available for Linux, so what is the point?

jlinkels

I'd like to see a QuickBooks port. I'd pay the full price. I'd also like to see an AutoCAD port to Linux.