Here are the presentations of Warpstock Europe 2017 with PDFs and links to videos, sorted by author.
Andy Willis
Andy does a walkthrough of the various modes and options of the ArcaOS installer.
Gregg Young
An update of Gregg's open source projects: Lucide, FM/2, Lswitcher, eFTE, multimedia plugins and others.
Keith Merrington
In his presentation, Keith talks about the new graphic installer for ArcaOS including some of its advanced scripting capabilities.
Lars Erdmann
Lars gave an in-depth presentation on USB audio support on OS/2.
Lewis Rosenthal
Looking ahead for the next 18 months or so, Lewis talks about developments for ArcaOS 5.0 and 5.1, including commercial vs. personal licences. other languages, installation from USB stick, migration from older OS/2 versions and much more.
René Jansen
René, chairman of REXX LA, provides some interesting background about the role of REXX inside and outside IBM. Not strictly OS/2 related but interesting nonethess since REXX is built into OS/2.
Silvan Scherrer
Silvan talked about current and future projects within bitwise works, including Firefox, Samba server, libcx, Cups, InJoy firewall, Apache's OpenOffice, Qt5 and Java.
Yuri Dario
Yuri explains why he uses Cairo for Styler, an improved presentation layer for the GUI of OS/2 that includes anti-aliased fonts, UTF-8 and other goodies.