Tenno if you like free stuff as much as myself you will find the following codes useful. 

Go into your market located inside your orbiter and hit reedem codes, then type in the following

For a free heat sword:
FREESWORD

Free Glyphs:
ADMIRALBAHROO
HOMIINVOCADO
IFLYNN
MCGAMERCZ
MCIK
MOGAMU
ORIGINALWICKEDFUN
PROFESSORBROMAN
SKILLUP
TACTICALPOTATO
TVSBOH

If you find that some are invalid let me know