Tungsten Coneheads are a great way to get your fly down in a hurry with a minimal amount of bulk. We use it on Kelly's CH Barely Legal but these are a great addition to any streamer pattern where you need the fly to drop quickly.
We're always a sucker for new yellow sally nymphs, and Jackson's BH Sally caught our eye the second we saw it. It features two biots for the tail, a pale yellow underbody, and one strand of black holographic flashabou that runs from the abdomen all the way up to the thorax for a nice mottled effect. Available in size 16.
This pattern was originally called the Hatch Master and has been around for quite some time, but had never been commercially available. The Hatch Master PMD features a hi-viz parachute post, dubbed thorax, and split tail made from a single mallard flank feather. This is a great pattern for selective trout feed on PMD duns, and the hi-viz post makes it extremely easy to see on the water. Available in size 16.
Oliver Edwards' Yellow Stonefly is another example of the right way to combine realism and effectiveness into a fly pattern. It features a biot body, dark wing case, and just the right amount of hackle for the legs. Available in size 16.