I have been running into some fantastic resources we can use for training while working from home. I will turn this post into a wiki so please feel free to add content:
1. SANS DFIR Summit (July 16, 17) [Now Free]
SANS have converted their DFIR Summit to a virtual event this year. And they announced today that it is now free. Registration: https://www.sans.org/event/digital-forensics-summit-2020
https://twitter.com/robtlee/status/1272959104735219713
2. Hal Pomeranz’s Linux Forensics Material
Hal Pomeranz announced yesterday that his Linux forensics material is available at archive.org as a torrent. Comes with a 30+ GB lab VM download.
https://twitter.com/hal_pomeranz/status/1242539945144745986
3. The Zoom Suit
Important to look the part for those of us who participate in video calls.
4. Capture the Flag for the National White Collar Crime Center
A new challenge is posted every morning during the week!
5. 13Cubed Videos
Richard Davis makes some amazing DFIR videos that you can binge-watch.
https://www.13cubed.com/episodes/
6. DFIR Blogs
DFIR.training offers an RSS feed that covers 572 (for now) DFIR blogs. Import their combined RSS feed into your RSS reader and have a constant stream of articles!
DFIR Blog List → https://www.dfir.training/dfir-blogs
DFIR RSS Feed → Sync.com | Control Panel
Thanks, Brett Shavers, for putting this together!
7. Azeria Labs
If you are into ARM exploitation and reverse engineering, Azeria has some new tutorials and labs here:
https://twitter.com/Fox0x01/status/1242226578505060352
8. Webinars
There are quite a few webinars and webinar recordings you can catch online. Here are two sources —thanks @bajerle.zoltan for the suggestion 
https://www.blackbagtech.com/webinars/
https://events.nuix.com/