It's been a while since my last post. Great to see this thread is still up!
Here are some more links to sites you can download free patterns (many multi-size) from. Many of the sites are not in English so Google translator for you. The patterns themselves can be interpreted easily once you find the download link. A few sites provide patterns as a large single sheet but these can be printed as multiple letter-sized sheets if you use the poster setting on your printer.
I recently put on a lot of weight and I'm now a size into "plus-size" so I know the struggle! Where possible I'll indicate if large sizes are available.
http://www.newsewing.com/ Includes kids, juniors, plus-sizes. Also http://wesew.ru/
http://sozowhatdoyouknow.blogspot.co.uk/p/free-patterns.html?m=1 panties, camisole.
http://www.papavero.pl/wykroje-do-pobrania. http://www.papavero.pl/wykroje-do-pobrania/651-lista-wykrojow-do-pobrania A personal favourite. LOTS of trendy, well-designed patterns. Many sizes go up to European 52. Also some patterns for men and children. You have to join the community to access the patterns.
http://m-sewing.com/. Not all styles have a pattern uploaded but many do. Some XL
http://www.initiative-handarbeit.de/de/Filter.php?&categories[ Sewing and knitting.
http://patronesmujer.com/gratis/ This lady is awesome!
http://www.ohmotherminediy.com/p/patrones-costura-gratis.html. She's awesome too!
http://porrivan.ru/ Lots of large sizes. Some very very cute.
http://www.lovesewingmag.co.uk/dressmaking/patterns-for-women From The UK magazine Love Sewing.
http://www.sewdaily.com/media/g/stitch/default.aspx From Stitch Magazine.
http://www.sewitallmag.com/patterns.html from Sew News Magazine.
http://materials.tell4all.ru/gotovye-vykrojki-zhenskoj-odezhdy/. Men, women, children.
https://www.fabric.com/creativity-headquarters-free-pattern-downloads.aspx. Fabric.com's free pattern page. Larger sizes accommodated.
http://www.tessuti-shop.com/collections/pattern-books Most for sale but the free ones are really cute.
http://www.tashadelrae.com/p/diy_16.html Great tutorials.
http://www.spitupandstilettos.com/product-category/womens/ These are really cute and multi-size.
http://rhondabuss.blogspot.com/search/label/Fabulous%20Free%20Pattern%20Friday This lady is fabulous!
And some of my favourites from Youtube