There's so much great stuff on aliexpress, but sometimes it can be hard to filter it down and actually find the really useful things, so I thought maybe we could all share various products and projects we've found stuff / done?
Insect screens: I couldn't find anything cheaper than $40 at bunnings, but these were awesome. I did 2 toilets, bathroom and kitchen with only 2 packs!
Drill bits: seems pretty simple, but this little self locking quick release bit head makes my life so easy. I also got some drill bits that use the standard hex and it's so much easier to swap between drill and screw.
RGB Wifi LED strip lights: Wired them to my ceiling, great for ambiant lighting, disco parties, instant themed decorating, you name it. All runs off my phone.