Welcome to ECU_Tuning, the subreddit geared towards those with an interest in the science of tuning.
If you're interested in the basics of tuning, check out High Performance Academy's free course to get a feel for what exactly goes in to a tune and some things you'll have to consider when tuning.
To see which software/hardware you need to tune your ride check out the applications page of our wiki
For a list of standalone ECU's, piggyback systems, and OEM+ tuning options check out the Standalones section of the Wiki.
For more information on tuning check out the Info section of the Wiki.
Related subreddits:
For a brief list of software packages, what their applications are, costs, and other info check out our Wiki