The repo was being moved from ton-community to ton-core. You can find the latest repo here in:
https://github.com/ton-core/tact
https://github.com/ton-core/tact-docs
https://github.com/ton-core/tact-template
Tact is a smart contract langauge compatible with TON. It is closer to Solidity than FunC, which makes it easier for developers to make the switch. However, recently its relevant repositories have been archived. Has Tact been sunset, or is it still in development?
Example of archived repository:
https://github.com/ton-community/tact
The repo was being moved from ton-community to ton-core. You can find the latest repo here in:
https://github.com/ton-core/tact
https://github.com/ton-core/tact-docs
https://github.com/ton-core/tact-template