Varien

"My production environment is pretty simple actually! I have some Samson Resolv A8 monitors, an M-Audio Keystation 49e and that's about it!"

At 0:59 into Varien's breakdown of his track Morphine, he opens up one instance of Kontakt 5 which also show some of his favorite sample libraries, one of which can be identified as Spitfire's Albion II: Loegria.

Throughout Varien's Youtube video, instances of Kontakt 5 appear in the channel strips for his song "Morphine". Additionally, at the 59 second mark he opens an instance of Kontakt and says "I've got my Kontakt 5 here, Kontakt 5 is where I have all my fancy synths and, y'know, choirs, strings, organs, blah-blah that you love so much about the Varien sound, it's all in here..."

In Varien's YouTube tutorial, he develops a new patch for Massive and gives away the patch in the video description; however, it appears the download link for said patch has expired.

reFX Nexus is the tenth plugin-instrument from the top of Varien's track "Morphine".

At the 0:48 mark, Sylenth1 is in the fourth and fifth plugin slots from the bottom of Varien's 'Pattern 13' window, listing the plugins used for various instrument tracks for his song "Morphine".

"I've got my 8Dio ambient guitars here, and I ran it through Native Instruments Guitar Rig 5." (1:54)

At the 0:48 mark, the second to last channel strip says Superior Drummer in FL Studio's sequencer for Varien's track "Morphine".

As seen in the FL Studio browser in this here given video by Varien, in the Fruity Wrapper files where the presets for external VSTs are located (including internal ones), there is a folder for Synplant, which implies that Varien uses the synthesizer itself.

"And here I have FabFilter Pro-Q. I love this. And this is the way I EQ my snares..."(2:29) Varien also opens an instance of Pro-Q as he introduces the plugin.

At the beginning of the video as well as the opening frame (seen before a viewer clicks "play"), iZotope Ozone 4 can be seen on the master track.

"VDUB1" samples are sprinkled in throughout Varien's arrangement of Morphine. VDUB1 is the filename abbreviation for Vengeance Essential Dubstep, Vol.1.

In his YouTube video, Varien uses various samples labeled with "VDE" (which stands for Vengeance Dirty Electro) and no single digit after them (which often indicates which volume that sample is from). As such, it's likely to be Vengeance Dirty Electro Vol. 1.

On the right, a long list of samples is shown, amongst which "VVE1" can be seen. This is a common abbreviation system Vengeance uses for their samples— in this case, Vengeance Vocal Essentials Vol. 1.

At 3:55, dBlue Glitch can be seen on a mixer insert.

At around timestamp 39:02, Varien opens Fruity Reverb 2

At 2:47 you can see some plugins Varien owns. One of them is FabFilter One Synthesizer Plugin.

At 2:47 you can see some plugins Varien owns. One of them is IK Multimedia AmpliTube 3.

At 2:47 you can see some plugins Varien owns. One of them is Camel Audio CamelPhat Multi-Effect Software Plugin.

At 2:47 you can see some plugins Varien owns. One of them is Sugar Bytes WOW Filter Plugin.

At 2:47 you can see some plugins Varien owns. One of them is FabFilter Twin 2 Synthesizer Plugin.

At 2:47 you can see some plugins Varien owns. One of them is FabFilter Timeless 2 Delay Plugin.

At 2:47 you can see some plugins Varien owns. One of them is FabFilter Pro-C Compressor Plugin.

Razer Music lists iZotope Ozone 5 under Varien.

Razer Music lists the Valhalla Shimmer plugin under Varien.

Varien's artist page on Razer Music lists him as using Pro-Q 2.