Trin is a tool to transliterate among Indian scripts. Trin can help you read and write (but not necessarily understand) text written in an Indian script if you can understand some other Indian script.
Transformations applied:
Trin uses the fact that most Indian scripts have a similar phonetic spelling system, and are arranged similarly in their Unicode code blocks. Hence, switching script mostly just requires adding an offset to each character's code point.
Trin is also available as a browser extension for Chrome and Firefox, so that you can transliterate content on web pages. Download the firefox extension, or see what the extension looks like (without installing it) at the example page. To build and install the extension yourself, check out trin's github page.
See the test page for examples and known issues.