Where is source code?

[JTRTech]

Welcome to SambaPOS 5

Hello. Today I’m releasing latest V5 version for forum members. Visit [V5 Release Category][1] for latest updates. For more than 4 years we worked hard to create a useful software for you and released SambaPOS for free to be able to share our idea with everyone. Today SambaPOS V4 working at +60K restaurants from more than 160 countries. We successfully kept SambaPOS project alive for a long time and we reached to a new milestone. We’re releasing a Professional version for people who wants to …

V5 Licence has been explained a few times.

V4 is free (few optional modules are paid - which are included as part of the V5 licence)

V3 is dated now but free and opensource. Anything v3 related is at Welcome to SambaPOS V3 Project! | SambaPOS V3, support forum will be quiet as few people still using.