Over the years many sails have come and gone from brands that no longer exist or in some cases were unbranded. Here is a few sails that dont belong to either of the BIG 3 (Neil Pryde, Gaastra, North)
Fanatic Take Off 1997 - Most probably a school or resort sail - notice the big cut outs in the luff to avoid water retention
Fanatic Take Off 5.0 (1997)
2012 Unbranded Fully Battened Sail - this full dacron sail remonds me of the 1984 Neil Pryde UltraNova
Unbranded Fully Battened Dacron sail 6.0sqm from 2012