Tile sets are the graphics that will interact with you in the game world. What can make your game truly different is the graphics. If you want even more tiles there are hundreds more on Forums.
Library Files -=Needed to Run Engine=- Eclipse Stable Eclipse Evolution 2.7
Sieken Densetsu 3 Tiles
Large RMXP Tileset
Red Cave / Elf forest Tilesset
Zelda Set One Zelda Set 2 Zelda Set 3 Zelda 4 Zelda 5 Zelda 6 Zelda 7 Zelda 8 Zelda 9 Zelda 10 Zelda 11 Zelda 12 Zelda 13 Zelda 14
Pokemon Tiles
Modern Tiles
02.gif GrassAddon.png PLantsAddon.png UberInDoorTileSet.png TreeAddon.png
http://www.phanxgames.com/-Good site http://www.teamanti.com/rmxp/-Decent site http://vorpal86.snesorama.us/-Small site, but some good stuff http://www.rmxpresource.co.uk/-Limited, but worth a look http://www.untamed.wild-refuge.net/rpgxp.php-Another small collection http://www.rpg-palace.com/rpgxp.php-Nice site http://www.kobrasrealm.net/-Didnt browse it much, but has a nice size collection http://z4.invisionfree.com/RPGRMXP/Have to browse the resources forum, but some good stuff in there http://www.rmxpu.net/-more stuff! http://www.alisachristopher.us/rmxp http://www.darkendlights.com/index.php http://www.phylomortis.com/-some chartacters and stuff. Tilesets are in chipset format, would require editing
Another Good Site
http://www.teamanti.com/rmxp/