JDE-1.4.9.jar is a release file of the Minecraft mod Jwan's DBC Essentials, made for Minecraft 1.7.10. It was published on April 1, 2022 and is 3.1 MB in size. For the full description, screenshots and every other version, visit the Jwan's DBC Essentials mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.