From time to time, I make use of some sparkly paints, pens, and other things in my traditional works. I also get questions from time to time about what they are, and where I got them. So here's a list of what I've found/used/like, and some comments on them.
Please keep in mind that I'm not affiliated with any stores, brands, or things I've linked here.
Key:
/ Have used previously.
Untested, but worth a look
Pens
Jetpens has a VERY helpful article going over metallic and glitter pens that they stock on their blog. It's worth a read!
Wink of Stella Brush Pens
These take a bit to get used to, but overall are VERY nice to work with.