I'm not sure how I end up being the one to do these lists? At any rate, I still peek into the forums here on occasion. It's only that maintaining my own serial site, my teaching job, and having a young daughter (who is almost 2) takes up most of my time. Particularly during quarantine. (If you're reading this years later, welcome to 2020 and a worldwide pandemic.)
I have found a bit of time this weekend to piece things together though, so I thought I would present as much as I've found. Then others can fill in the rest below. Gives everyone something fun to read.
Quick recap first:
April Fools Swap of 2011 (the original): http://forums.webfictionguide.com/topic/happy-april-fools-day
April Fools Swap of 2015: http://forums.webfictionguide.com/topic/2015-april-fools-master-list
April Fools Swap of 2016: http://forums.webfictionguide.com/topic/2016-april-fools-master-list
April Fools Swap of 2017: http://forums.webfictionguide.com/topic/2017-april-fools-master-list
April Fools Swap of 2018: http://forums.webfictionguide.com/topic/2018-april-fools-master-list
Now 2020. I've been able to discern that:
ATL: Stories from the Retrofuture (by Thedude3445) was written by Miranda Sparks
Sleep Mode - Chapter 1: Inviting Me Over. http://atl.quinlancircle.com/2020/03/31/09-sleep-mode-chapter-1-inviting-me-over/
Fang Force (by Miranda Sparks) was written by Sunflower of Ice
A Bold New Direction. http://mirandasparks.com/fang-force-19-bold-new-direction/
Technically Abroad (by Sunflower of Ice) was written by AdmiralMonkeyman
Expansion 6. https://technicallylifeabroad.wordpress.com/2020/04/04/expansion-6-shift/
Fuji (by AdmiralMonkeyman) .... is at this website: https://fujiserial.wordpress.com
If they had an entry written, it doesn't link into the table of contents.
I also couldn't discover what Thedude3445 might have written.
And no one else had posted into the "Swap 2020" thread that might let me pick up the trail, so there you have it. Feel free to read comments below for more information, or reactions to the above posts.
Oh, and if you're wondering why I didn't participate, I didn't trust myself to do a proper job with all the things on my plate (which included needing to find a new daycare to start February, heyo). Happy readings!