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It's been a while since AMD has released a WHQL version of their Catalyst drivers, but the company has finally decided that their recent 14.4 drivers, from a new driver branch (14.100), are ready for all. The Catalyst 14.4 WHQL drivers are the same as the release candidate AMD posted on Monday, which are similar to the beta drivers handed out with the Radeon R9 295X2.
Naturally, Catalyst 14.4 supports the powerful dual-GPU R9 295X2, but it also brings full support for OpenGL 4.4. It's unlikely we'll see OpenGL 4.4 features being utilized immediately, but it does support buffer storage objects for HSA-enabled chips (eg. AMD's new APUs like Kaveri) and sparse textures, to name a few.
Aside from OpenGL 4.4 there's the usual range of performance improvements and bug fixes. AMD specifically highlights a range of frame pacing and CrossFire fixes for games such as Crysis 3, Titanfall, Metro: Last Light and Far Cry 3. Mantle in Battlefield 4 has also been improved through a few minor fixes.
Download links are here for 64-bit (http://sites.amd.com/us/game/downloads/Pages/radeon_win8-64.aspx) versions of Windows and here for 32-bit (http://sites.amd.com/us/game/downloads/Pages/radeon_win8-32.aspx) systems.