“Maple.FM is a community and tool that allows players to search through MapleStory’s Free Market as well as a complete database of information about the game.” -Maple.FM
As it’s name would insinuate, it is based around the MapleStory Free Market.
Thus Maple.FM, a simple and easy to remember hyperlink. For the time being it works like a live shop feed of all the vendors in-game and the side bonus of a forum. (Time being?)
The main portion of this site(The FM) works similarly to an Owl of Minerva, which you can purchase via Cash Shop in-game. The only differences are that it’s free, has unlimited use, and you can browse out of game. You do have to find the vends on your own, and there is a delay on the items listed. However that is expected, this service is free but very well worth it!
It’s a wonderful website, and I truly wish MapleStory would have had this years ago when the game was much livelier.