With this mod installed, dropped items will not disappear when a Creeper blows them up. There is a single configuration option (onlyWithMobGriefingGamerule), which defines whether the gamerule mobGriefing affects the mod's behavior or not, and is set to true by default.
If the config option is set to true, items hit with a Creeper explosion will only get spared if mobGriefing = false.
The mobGriefing gamerule is set to false in this showcase.
You are allowed to use this mod in any modpack.