There are a multitude of options in the internet for typing in Telugu. A few of them are listed below

Web Based

1. Lekhini - A web based tool to type in RTS format
2. Quillpad - An AI-based transliteration system
3. minee - A web based tool to type in Inscript format
4. Sripadma - A web based tool to type in RTS format with autosave option
5. యంత్రం లేఖిని - A web based RTF tool to type in RTS format
6. Transliteration tool from Google

Installable

1. Baraha IME - An installable tool on windows to type in RTS format
2. Aksharamala - An installable tool on windows to type in RTS format