The CE Toolchain incorporates a variety of tools in order to build programs in C/C++ natively for the TI-84 Plus CE calculator series.
Visit the CE Toolchain documentation. This site hosts all the information for working with the toolchain.
You can join us on the CE Programming Discord server in the #ez80-dev channel: Discord Chat Link.
If you prefer IRC, the chat is also bridged to the EFNet #ez80-dev channel (you can use a web client like IRCCloud, if you don't want to use a local application).
Depending on how active the channel is you might not get a response.
In that case, post your questions here or here, and we will get back to you as soon as possible.
Documentation for contributing/building the toolchain can be found here.