for fly spray, i rotate between duraguard (orange bottle) and endure (black bottle with blue label). i get them from either tractor supply ( duraguard $16 endure $20) or jeffers (duragurard $14 endure $16 - plus shipping) you should be able to find both at dover.
shampoo/conditioner - i love cowboy magic products!! rosewater shampoo and conditioner works really well on my horses. gives great shine, and really cleans my grey. lather up the icky nasty tail, let it sit while i scrub the body, and rinse. it rinses clean, no static, can use with cold water or warm, helps repel the flies (in my opinion), it removes tough stains and my horses just gleam!! did i mention that my horses are out 24/7, and my grey looooves to roll? he's always a gross, stained mess. i get this at jeffers for $25 for a gallon (which lasts forever for with my 3 horses bathed at least monthly in the spring and summer) and the condition (i only use on mane and tail) is around $7. i have to admit. my son used all my shampoo, once, to give himself a bubble bath (never leave a 7 yr old unattended...lol), and i didn't feel like driving 45 min to town, so i used the rosewater shampoo and condition on me, once. it really is nice stuff!
as for washing your blankets, saddle pads, wraps, etc...i use either wool lite or dreft, and wash everything on the gentle cycle, then air dry. for really tough smells, etc, i add a bit of odo ban pet in the washer, it's antibacterial and SAFE. does a great job! i will highly suggest that you DO NOT use fabric softener! made for a real slippery ride!
because i don't show and don't have to detail my tack, i like to use Leather New. it's not an "all in one" product, but just soap. it does do a great job on my schooling and trail tack. i recently had a 50 + yr old western saddle given to me. i have to clean and oil it. i plan to see how the leather new does for this, then follow up with a good neatsfoot oil treatment. nice saddle, just needs a lot of tlc.
hope this will help you!
edit: you can google jeffers equine to get the link to their website. for some reason, the link won't attach for me!