If it's sort of joined up translucent globules, sorry terrible descrption, then it could be water retaining gel, especially if you've added to any pot compost that has ended up in the garden.
If it's dark brown slime then hedgehog poo an option!
Small opalescent pearls in clumps are slug eggs- birds love those.
I think there is also a slime mould that likes damp, compacted soil. J.