Here's a list of all the pattern sales I could find. Feel free to submit sales you find via the comments section below. I will update with new sales whenever I find them!

Terra's Treasures: Friday through Monday, 25% off with code LABORDAY25 at www.terrastreasures1.etsy.com

Aivilo Charlotte: 40% off now through 9/2 at aivilocharlotte.etsy.com with the code LABORDAY2013 or my craftsy shop is already discounted at 40% off.
http://www.craftsy.com/user/496600/pattern-store

Patterns By Tina: 20% off Today through Tuesday (ends 9/3) Coupon Code is: LABORDAY2013. My etsy site:https://www.etsy.com/shop/PatternsByTina

Felicity Sewing Patterns: Bargain Basement Sale at all my shops plus you can save 15-20% with bundle deals. www.felicitysewingpatterns.com

Nimblephish: 30% off everything in store, good through Monday 9/02. Coupon Code is LABORDAY30 https://www.etsy.com/shop/NimblePhish

Tikatuly: 15% off starting tomorrow through Monday, code LABORDAY15 https://www.etsy.com/shop/Tikatuly

Tie Dye Diva: Reversible Fleece Hoodie Vest pattern only $5 and you can use code BUNDLE to save 25% on any 3 or more patterns too. Friday and Saturday only.
www.tiedyedivapatterns.com

Funktional Threads: I'm marking my patterns in my Craftsy shop down 25% for the weekend. Starts tomorrow morning (once I get them edited) and runs through Monday night. http://www.craftsy.com/user/1608408/pattern-store

Ellie Inspired: 25% off entire shop Friday - Monday. Code LABORDAY
https://www.etsy.com/shop/EllieInspiredClothes

Foot Loose and Fancy Free: 25 % off entire order on web site starting now until Tuesday 9/3 till 11PM Use coupon code 25OFF www.footloosenfancyfree.com "Etsy on Sale" 25% OFF https://www.etsy.com/shop/FootLooseFancyFree...

Rabbit Rabbit Creations: Buy 2 get 1 free on all patterns. http://etsy.me/Yi324S

Fancy Schmancy: 20% off Total Purchase with code LABORDAY2013 http://www.fancyschmancybyjeni.etsy.com

GoTo Patterns: Coupons on site http://gotopatterns.com/

FairyTale Frocks and Lollipops: Labor Day Savings at
www.fairytalefrocksandlollipops.com --- enter the code: LABOROFLOVE and take 15% OFF your entire order - shop 50+ fabulous independent e-pattern designers in one spot! Happy Sewing!

Charming Ollie: 15% off Charming-Ollie through LABOR DAY with code 15LABORDAY2013 https://www.etsy.com/shop/charmingollie

Seamingly Smitten: Start the weekend early!! Save 40% off your entire Seamingly Smitten - sewing patterns purchase today through Monday! Use code: HAPPYLABORDAY40 at etsy checkout. Spoil yourself over the holiday! https://www.etsy.com/shop/SeaminglySmitten?ref=si_shop

Paco Bean: Now through Monday, get 20% off with code: pbtwenty Valid at pacobeanpatterns.com only http://www.pacobeanpatterns.com

Sew Sweet Patterns: Sew Sweet Patterns is having a end of summer sale! Use code SUMMER for 25% off your entire pattern purchase!
http://www.sewsweetpatterns.com/

Little Lizard King: Little Lizard King is offering a buy four get one free special from http://littlelizardking.com/ If you buy four patterns in a single transaction, LLK will send you a fifth pattern free of charge (of equal or lesser value) Please do not purchase the fifth pattern; simply email littlelizardking@gmail.com indicating which one you want free. Also, Buy our Bubble Skirt for $5 using code: bubbletrouble on www.littlelizardking.com

Millie Rose Patterns: Enjoy 15% off Millie Rose Patterns for the Labor Day weekend. Use code LABORDAY. http://www.etsy.com/shop/millierosepatterns

5 and 10 Designs : LABOR DAY SALE - Save 15% - off the Five and Ten Designs Volume One eBook this weekend only! Simply use Coupon Code 'LaborDay' at checkout!!! http://fiveandtendesigns.com/

Too Sweets Patterns: 30% off. http://www.etsy.com/shop/toosweetspatterns code is LABORDAY

Sisboom: This PDF Pattern sale will cure your end of Summer blues – We promise! Buy 2 PDF patterns (minimum $20) or more to activate 40% off your entire PDF pattern order after coupon code BACK2SCHOOL is applied at check out.How it works: Buy 2 or more PDF Patterns and get 40% off your entire PDF pattern order! Use coupon code BACK2SCHOOL. So, 2, $10 patterns would be $12, 3 $10 patterns would be $18, and so on! Please Note: 2 pattern ($20) minimum required to activate sale. Sale ends Monday September 2nd at midnight. Coupon code BACK2SCHOOL will activate coupon code

Cottage Mama: 10% off with the code NEWWEBSITE. It's not labor day sale, so not sure how long it lasts .http://thecottagemama.com/the-cottage-mama-shop/

Everything Your Mama Made: I am excited to share my first sale! I don’t plan on having traditional sales often so if your a sale shopper take a second to check this out! Now thru Monday 9/2 at 11:59PST I have marked down all the patterns in the Craftsy shop NO COUPONS NEEDED! Save 10% on all 3 of my individual patterns (on sale for $4.45-$8.95) OR Save 20% off my Dolman Top Bundle pack that includes both the Carlie’s & Kymy’s Dolman Top patterns ($15.90 for $19.90 in patterns). Not only that, but as a free extra, next week I will be sending out the 18″ doll expansion (.99 value) to all bundle customers to their paypal email! http://everythingyourmamamade.com/2013/08/30/eymm-labor-day-sale/

imaginegnats: 25% off with code work25 http://shop.imaginegnats.com/

EmmylouBeeDoo: 20% off with code "labor20" https://www.etsy.com/shop/loubeeclothing

Monkeysbug: Need a little Labor Day sewing motivation? Use the code LABORDAY at www.monkeysbug.com for 25% off your order of any and all patterns.

Ruby Jean's Closet - Labor Day SALE! Buy two, get one free (of same or lesser value). Just leave me a note at checkout letting me know what free pattern you want. https://www.etsy.com/shop/RubyJeansCloset?ref=si_shop Sales ends midnight, Sept. 2.

Hailey Bugs Closet: I have my new pattern on sale for $5 for Labor Day Weekend. Here is the linkhttp://www.craftsy.com/.../66781...