Sundayville is a survival modpack based off of Towny from RSMV.net. It contains mods like Tinkers' and Natura. It also has automation in it like Ancient Warfare. This modpack makes it fun and easy to build your own town in Minecraft.
Chisel, Better Builder's Wands, BiblioCraft ,ArchitectureCraft, Forge Multi Part, Carpenter's Blocks and MalisisDoors here are some building mods to help you to build up your towny on your minecraft world .