Android - When will my device get the Android 6.0 update (Marshmallow)?

This community wiki will list all of the known and rumored dates for devices. If you have an update make sure to follow the format that's been established, and the following guidelines:

1. Keep devices in alphabetical order listing the manufacturer and model
2. Specify if the date is confirmed or rumored and link to the source
3. If there is an unofficial release, link to the site where it can be downloaded

Phones

HTC

• Butterfly 3 - announced - (source)
• Desire 816 - announced - (source)
• Desire 820 - announced - (source)
• Desire 826 - announced - (source)
• One E8 - announced - (source)
• One E9 - announced - (source)
• One E9+ - announced - (source)
• One M7: Never (confirmed)
• One M8 - by the end of 2015 - (source)
• One M8 EYE - announced - (source)
• One M9 - by the end of 2015 - (source)
• One M9+ - announced - (source)
• One ME - announced - (source)

LG

• Nexus 4: Never (confirmed)
• Nexus 5: 2015-10-05 (confirmed)

Motorola

• DROID Turbo - announced - (source)
• Moto G and Moto G with 4G LTE (2nd generation) - announced - (source)
• Moto G (3rd generation) - announced - (source)
• Moto MAXX - announced - (source)
• 2014 Moto Turbo - announced - (source)
• Moto X (2nd generation) - announced - (source)
  • Pure Edition in the US
  • in Latin America, Europe and Asia
• Moto X (3rd generation) - announced - (source)
  • Pure Edition
  • Style
  • Play
• Nexus 6: 2015-10-05 (confirmed)

OnePlus

• OnePlus One
  • Cyanogen OS - in first quarter of 2016 - (Source)
  • OxygenOS - no fixed date confirmed, but not in 2015 - (Source)
• OnePlus Two - in first quarter of 2016 - (Source)

Tablets

Asus

• Nexus 7 (2012): Never (confirmed)
• Nexus 7 (2013) - 2015-10-05 (confirmed)

HTC

• Nexus 9: 2015-10-05 (confirmed)

Samsung

• Nexus 10: Never (confirmed)

Other

• Nexus Player: 2015-10-05 (confirmed)

Seems too early estimate carrier device deployments. For Nexus devices, there is a tad more info. According to the Android developer's site, here's the expected OTA schedule for Android M releases: