30 Genius IKEA BILLY Hacks for Your Inspiration - http://centophobe.com/30-genius-ikea-billy-hacks-for-your-inspiration/
Buy some cheap Billy bookcases from Ikea and buy molding that you can add to the top and and also some to create that X pattern on the doors. Very stylish and the "Billy" feel disappears.
DIY Built Ins from IKEA Billy Bookcases + One Room Challenge Week 2 | http://blesserhouse.com - A step-by-step tutorial for how to make professional looking built in bookshelves using IKEA Billy bookcases for vertical storage.
54 IKEA Billy Bookcase Hacks | ComfyDwelling.com
Nope, can't understand why IKEA offers some BILLY doors at full height only. Case in point, the OXBERG glass door. If you're in the market for half-height glass doors and do not plan on hacking the OXBERG, then this is for you.