Tamil
Tamil has its own script and belongs to a different language family from Sanskrit. It has its own characters, numerals and grammar.
Characters
Twelve vowels, eighteen consonants, and one character that is neither. See how the script is put together.
Numerals
Ten digits, plus separate characters for ten, a hundred and a thousand. See how every number in between is built from them.
Grammar
Tamil builds words by adding suffixes one after another, where Sanskrit fuses them. See how that works, and why Tamil is described as having a ninth noun case and a fifth gender.
Sanskrit in Tamil Script
How the Chamakam's Sanskrit is written in Tamil letters: Grantha letters where Tamil has none, and superscript numbers where Tamil has a letter but not enough of them.
Antāti
The chain-verse form of most Tamil chants on this site. Each verse begins with the last word of the one before, and the last verse loops back to the first.
Rosetta Stone
Sanskrit and Tamil side by side, letters and grammar: where the two unrelated languages line up and where they don't.