Course Providers
Gannet Fleming
Wide selection of 50+ courses, most are on-demand and all are free and easy to sign up for.
Noon-Pi
Not on-demand, must pre-register for webinars but one of the few options I've found that offer Ethics PDH hours (required by some states). All 1 credit hour. Not the biggest fan of their webinars, but can't complain about a free resource.
Texas Board of Professional Engineers
Free Ethics webinar, registration is limited but are offered regularly and a good resource if your license requires an Ethics credit. Not limited to Texas PE's, anyone can register.
ACPA (American Concrete Pipe Association)
Has several free ethics PDH courses available.
Hilti
Free courses and webinars. Understandably all related to Hilti products.
Upcoming webinars: hilti.com/engineering/webinars
Web sessions / recorded sessions: hilti.com/engineering/series
Simpson
Similar to Hilti, all related to their products. Last I checked there are 24 free on-demand courses available ranging from 1 - 2 hours of credits.
Procore
Construction oriented courses, all on-demand and a large number of options.
The Wood Institute
Free and on-demand courses ranging from 1 to 2 hours of credits. Didn't count toward my license but 10+ pages of course options!
American Wood Council
Must create a free account to sign up, but there are a variety of free on-demand courses available with 1 - 2 credit hours. Presumably there are live online courses as well, but I haven't seen any offered when I've looked.
ENR (Engineering News-Record)
Wide variety of construction and engineering related free on-demand webinars, primarily from sponsors.
Tensar
Geotechnical oriented, but free courses starting at 0.5 credit and up.
Structure Mag
Webinars (about every 2 weeks) and on-demand but many do not provide continuing education credits so be careful.
PCI (Precast/Prestressed Concrete Institute)
Variety of concrete related courses, some are no credit but large number of on-demand options with pdh credits for free. Also hosts free monthly webinars.
On-demand courses: oasis.pci.org
Monthly webinars: pci.org/webinars
Short Span Steel Bridges
Scroll to towards the bottom and look for Featured Events, you'll find events labeled "Free Webinar" which provide a credit. Their on-demand videos do not provide credits.
Informed Infrastructure Magazine
Sponsored webinars for free, several dozen past courses available going back about 2 years.
Ron Blank & Associates
Frequent webinars available, past webinars are not available for credit but there are on-demand courses available for credit.