LiveCode
From Just Solve the File Format Problem
LiveCode is cross-platform development software similar to Hypercard.[1] Originally named Metacard, then Revolution, now LiveCode.[2] For a number of years there was an open-source community edition of LiveCode[3], but was closed in 2021.[4]
Format Description
LiveCode uses extensions REV and LIVECODE. Metacard and early Revolution version 2 used a shell style format with the ascii header,
#!/bin/sh # MetaCard 2.4 stack
.[5]
Version 2.7 has header "REVO2700"
Version 5.5 has header "REVO5500"
Version 7.0 has header "REVO7000"
Version 8.0 has header "REVO8000"
Version 8.1+ has header "REVO8100"