Here are lists of resources I think are consistent with systematic, explicit, synthetic phonics principles, but please check them out yourself before purchasing. My aim is to help with your search, but inclusion on these lists does not constitute an endorsement.
I’ve included country of origin in brackets (Aus = Australian, UK = British, US = American, NZ = New Zealand), and highlighted free resources. Please tell me if I’ve left out something good, or you notice something is out of date: email@example.com.
Resources suitable for preschoolers
Classroom programs for children aged ~5-7
Small group or 1:1 programs for children age ~5-7 needing extra help
Home programs for children aged ~5-7
Catch-up programs for older children and teenagers
Programs and activities suitable for adults
Software, apps and websites
Other useful stuff – workbooks, manipulatives, gizmos, gadgets, posters, charts, bookmarks, games…
And on a related topic, you can find good information about handwriting here and here.