Sound dust
Wavelore

I don't think anybody mentioned these guys yet:
 
http://www.kontaktbanks.com/products.html
 
Deepflight is superb.  I've heard very good things about their Matrix library as well.

dmbaer
I don't think anybody mentioned these guys yet:
 
http://www.kontaktbanks.com/products.html
 
Deepflight is superb.  I've heard very good things about their Matrix library as well.

I know them as Pink Noise Studio. Yes. Their Kontakt library synths sound are awesome.

Great stuff, I'm on a cheap/free binge at the minute. 

I'm surprised at how many of these companies' products are actually already in my collection, and I've just forgotten about them! But there are a few here that I'm not familiar with.
 
So, can I tap the collective knowledgebase one more time and ask for you to suggest a favorite product from each of these vendors? 
 
For example, if I was going to send somebody to Indiginus, I'd steer them to Torch or Solid State Symphony first, because they are popular favorites. For Wavesfactory, it would be the Tea Towel Drums. Embertone, the Shire Whistle or Sensual Saxophone.
 
But I am not as familiar with, say, Hideaway Studio. There are just SO many products, and frankly, many sound similar or are at least in the same genre. Is there one in particular that would likely get somebody excited about the product line?
 
What I'm after is one inexpensive product that's representative of what each vendor does.

For me Hideawaystudios excels for pads and that is what most of my purchases have been for it is a really great source for inspiring rich pad sounds.
 
I would recommend the orbitone collection as the best single example for the breadth of different sounds you can get through mixing patches together as well as included sample content, the s-vx only being pushed out because of the upgrade that orbitone had.

Realitone has a couple of cute libs cheap.
 

jatoth
Realitone has a couple of cute libs cheap.

Oh, yeah their banjo is a lot of fun.  They have a decent acoustic guitar too.  Both under $50.
 
My current favorite Kontakt drum library:  http://fraublucheraudio.tictail.com/product/the-songwriter-kit
 
Cheers,
Eddie

Three more I don't think have been mentioned yet:
 
www.insusurro.com
www.xtant-audio.com
http://bigcatinstruments.blogspot.ca/
 

SampleModeling and Ilya Efimov both have some great sounding Kontakt libs.

http://ilyaefimov.com/
http://samplemodeling.com/en/products.php