Jahnabi Multilingual Input Tool

Jahnabi Multilingual Input Tool is a relatively simple application created with the purpose of popularizing the Assamese language by enabling users to write in this script using their standard keyboards.
It allows you to write Assamese in Unicode and Non-Unicode, but also offers support for other languages and alphabets, namely Hindi, Ahom and Devnagari.

Lightweight application that has a fairly simple installation procedure

The program is not at all difficult to set up, but it is important to note that the installer needs to be run in Administrator mode.
Once this operation has been completed, the tool can be put to use as soon as you select the desired keyboard layout, although you may also wish to set up a hotkey for switching between English and the selected language.

Unobtrusive application that can be configured from the system tray

Given that users who install Jahnabi Multilingual Input Tool are likely to keep it running at all times, it is a good thing that the application can be sent to the system tray and does not clutter your taskbar unnecessarily.
To make things even easier, you can switch between the standard layout and the one provided by the application with a customizable hotkey or by simply clicking the program’s system tray icon.
Furthermore, you can bring up an image that provides a graphical representation of the current keyboard layout.

Choose one of the available layouts or create your own

Jahnabi Multilingual Input Tool includes a fair number of keyboard layouts suitable for various users, but it is also possible to build new ones. The instructions are available in the bundled documentation, which also provides information about the existing layouts.
All in all, Jahnabi Multilingual Input Tool is a fairly straightforward utility that can help you write in Assamese, as well as other languages. It allows you to switch between multiple keyboard layouts easily, and is unobtrusive enough not to get in the way of your other activities.