For typing assistance in various encodings (like Bamini or Tscii), tools like Azhagi+ allow for direct Tamil transliteration and typing in most standard applications.
To avoid malware often bundled with unofficial "patched" downloads, use these verified methods: Trusted Repositories : Check the Microsoft Store tm heera tamil font download patched
is a popular Tamil typewriter-style font. The patched version solves common problems like: For typing assistance in various encodings (like Bamini