Tools for the Buriko General Interpreter (BGI)/Ethornell visual novel engine.
BgiDisassembler: disassembles ._bp script files.
BgiImageEncoder: encodes images to the engine's proprietary "CompressedBG" format. (To decode existing images, use e.g. GARbro)
If you're looking to translate an Ethornell game, take a look at VNTextPatch.