Please help ID

[kimts]

There are 5-6 of these roundish flat purple things on my glass and this oblong off white critter. Can y’all help ID? These are the best pics I could get, and I know the glass is dirty …dealing with a broken wrist, so maintenance is very limited.

 

[shcrimps]

first two pics look like coraline
last two look like either chiton or limpets
hard to tell from just the bottom