Just come across Literactive which has some good stuff for pre-school to grade 1. I only found it today so I haven’t fully explored it, but so far it looked good.
We have also been using this free Montessori reading website now and then.
I have also just found Sylvan Dell Publishing which also looks pretty good. There’s a charge for full usage of around $49 a year with discounts for extra years and so on. Those in homeschool co-ops look like they can get discounts too. (Co-ops don’t seem to exist much here in the UK).
there are some nice little colouring and activity sheets at CRAYOLA
Learn some of the basics of British Sign Language here
This free science curriculum isn’t perfect but it has some good stuff and it’s free.