Noise Software Plugin

I have been using the Noise Ninja plugin for Photoshop for years, but have failed to keep informed about other products. What else is out there that may be superior to NN?

What do you like? Why? How long have you used it?

Durwood, I use NIK Dfine2 with PS 5. I've used the combination for a couple years now and find that it works very nicely. For general noise reduction I've found it to work as well as needed to date.

Ditto on NIK Dfine2. I've used it for years with CS4, CS5 and now CS6

I also use Nik Dfine , but also the Topaz De-Noise 5 - in some situations, each is better than the other (I have found).
Sandy

Noise Ninja is still among the top tier of excellent noise reduction software.

I'm a Nik Define user as well. I find that it gives me a lot of flexibility on how much noise reduction to apply, and be able to "paint" it on in selected areas so I don't lose detail in other areas. Other software may allow the same thing, but Define really makes it easy for me.

Durwood, what Photoshop version are you using? Reason I ask is that Adobe made an effort to add noise reduction in ACR back in CS3 I think, but it was 3 inches short of useless, and CS4 was no better. Since CS2 I had been using Noise Ninja, but when CS5 came out, the whole game changed. Adobe redid the algorithms in their noise reduction and sharpening in the ACR version that shipped with CS5, and all of a sudden it became the only noise reduction and input sharpening I need. CS6 seems to be even better just in smoothness without killing detail which probably has to do with the fact that the ACR in CS6 was released with an updated Process Version, which means major new algorithms. Adobe only does the updated process thing every few years, but when they do it often has some serious improvements. I've reprocessed older raw files in the CS6 ACR and the difference is huge, especially in the area of sharpening and noise reduction and especially highlight recovery (probably the best reason to get CS6). Anyhoo, since the sharpening and noise reduction are in ACR, it's non-destructive and changeable! Each image I open gets enough of ACR's sharpening to make it a bit gritty, then the noise reduction slider to clean it right up. I barely use NN any longer.

I'm using CS6 and agree NR is much better now but still have times when Noise Ninja comes to the rescue. As with Sandy, sometimes Topaz De-Noise works better. Since among these 3 choices I always get results I want, I felt no need to investigate Nik or any others. Nik may be better or worse but I'm happy with what I have.
JR

Another vote for Nik Define

Nik Define was my choice. LR4.1 has some good NR features also.