Creative Blocks
This mod allows you to build in survival mode as if you were in creative mode. You can configure which blocks will work in a special "creative" mode.
Main Features
- Flexible Configuration: After the first launch of Minecraft with the mod installed, a default.json file will appear in the config/CreativeBlocks folder where you can add blocks to the whitelist
- Resource Saving: Blocks from the whitelist are not consumed when placed - they remain in your inventory
- Special Destruction: When broken, such blocks do not drop as items
- Instant Breaking: Blocks from the list break in one hit, as in creative mode
Important: Settings are synchronized from the server to all clients and can be reloaded during gameplay using the command /creativeblocks reload

Additional Information
You are welcome to add this mod to any modpacks of your choice.
The idea for creating this mod came from a discussion on Reddit where users were looking for a way to build in survival mode with the conveniences of creative mode.