Kreativ Sounds‘ LOOPSalad Minipacks series sample libraries are being sold Radiohead style; you name the price you want to pay.
LOOPSalad Minipacks are a series of elastic and pre-sliced audio loops ready to be used virtually with any audio sequencer. The minipacks available are:

Ambient Textures
Arp Chords
Bass & Drums
Sequential Riffs and
Twisted Vintage.

Minipack features:

44KHz/16bit RX2 and ACIDized [...]

bioLogic has released a free set of Djembe samples:
“I’ve been wanting to get back into sampling instruments, so I snuck my cousin’s djembe, brought it over, and cooked up this little beast in HALion format.
I recorded and compiled it yesterday and today, and played it about 15 minutes once I tweaked it right. I’m loving [...]

Inspiration Sounds has introduced Pure Live Breaks Volume 1, 270MB of drumloops recorded at tempos from 95-130 BPM and presented in Acid, Apple Loops, REX, and WAV Formats.
You can preview the library below.
A free sample pack is available for download (.zip)
Specifications:

270MB Content
ACIDized Wave Files
Apple Loops
Rex2 Loops
Loops at 95, 100, 105, [...]

 

 Pure Live Breaks: Play Now | Play in Popup | Download

Michael S. Schneider, author of A Beginner’s Guide To Constructing The Universe, has published an interesting analysis of the Amen Break (probably the most important sample ever).
In his analysis, the Amen Break may be popular because of the way the Golden Ratio is found it the break’s timing:
Having looked at the geometry of the Golden [...]

Sonic Cinema has three free sample packs for download.

Foley Series Vol. 1 - Gloves and brushes (WAV and Soundforge files), a ACIDized sample pack and the first edition of Sonic Cinema’s Foley Series. Containing foley sounds for that extra touch in your production. Be it a score for film or a cinematic music piece.
Foley Series [...]