Vietnamese Keyboard for Windows
UniKey is a very small and easy-to-use Vietnamese keyboard for Windows.
UniKey is free and open-source. You can freely use UniKey under the terms of The GNU General Public License.
See screenshots of UniKey.
Many character sets/encodings:
TCVN3 (ABC), VN Unicode, VIQR
VNI, VPS, VISCII
BK HCM1, BK HCM2, Vietware-X, Vietware-F.
Unicode UTF-8, Unicode NCR Decimal/Hexadecimal - for Web editors.
All 3 popular input methods: TELEX, VNI and VIQR.
All Win32 platforms: Windows 9x/ME, Windows NT/2000/XP.
UniKey is very small (~ 120 KB), does not need any additional library.
No installation is required.