Trainers, translations and other ROM hacks to be applied on GameBoy Advance ROM images.
Tools, file formats and techniques for editing commercial games are also discussed in GBAtemp's ROM hacking section which will have additional information for the GBA, DS and more.
Many tools are useful across systems (a hex editor works much the same regardless of the system you are working on) so do also check out the Filetrip's general programming tools section.
That looks like the router i just got from microcenter. Spectrum wanted to charge me $7 a month for a wifi router, so I said no thank you and just bought one, I paid like $65 tho