I don’t know of a specific place, but googling works well. You can also type in “knitting glossary” and get some answers there probably. Here’s a few that I know of from what you asked.
Stitch markers (locking, split ring, circular) -[B] stitch markers do just what they say…they mark a stitch or particular area of knitting that you need to remember something. I use them when I’m doing something like decreasing the top of a hat. Then I can just fly around w/o counting. Locking markers can be used anywhere on your knitting, circular markers are used on the needles and are slipped from one needle to the other as you knit. I don’t like split ring markers, but they can be used either way. [/B]
t-pins -[B] these are used for blocking a finished project if it needs it.
[/B]cabone rings - [B]The only time I’ve seen these used is when you knit or crochet around them for buttons or something. [/B]
knitting bobbins - [B]bobbins are used to wind a small amount of yarn when doing something like intarsia.[/B]