You can download UniKey 4.3.4 from our software library for free. The program lies within System Utilities, more precisely Fonts. Our antivirus scan shows that this download is malware free. The actual developer of the free software is Pham Kim Long.
From the developer:
UniKey is a very small and easy-to-use Vietnamese keyboard for Windows.
You may want to check out more software, such as Avro Keyboard, which might be similar to UniKey.