Online Telugu Typing Tools
Lekhini is a good tool for typing in Telugu. There is a goide to type telugu. It is available online.
Google service also provided online telugu typing service. it has words suggetion. Font decorations options such as Bold, Italic, Underline, color, Alignment etc., also available.
Installable Telugu typing software
baraha.com installations telugu typing software for windows operating system. It is also instals telugu fonts and other telugu tools. It can work offline.