They just opened up a really detailed "world" on World Anvil for Frog God Game's The Lost Lands. There is tons of system neutral info from about 2 decades of printed sources. The material is already impressive and being added to daily.

They plan on releasing at least one Frog God Module a month on the site plus several others things at the paid perk levels (which include a $3 kickback store coupon)

The adventures for the foreseeable future will be first put up in 5E format but S&W and possibly PF1 (not sure if heard that officially - I care most about the S&W versions) The first two are from Quests of Doom 4.

Check it out and follow it if interested: