1)
RusFon 3.2.4.52
RusFon is a transcription-software, which converts letters from one alphabet (Cyrillic) to another (Latin).
2)
RuTast 2.3.6.10
RuTast-Software makes it possible to write Cyrillic (Russian) letters, using an English keyboard.
3)
wReplace 1.2.Free
Free program, which allows you to change/replace multiple letters and phrases at a time. It is easy to create and save lists of changes/replacements, so that you can reuse them.