Based on the Kinyarwanda dictionary at http://words.fienipa.com/browse/rw
Get the dictionary here.

Compatible with OpenOffice 3
Get the dictionary here

Get the installer here

Find installation help here.

For all versions of Microsoft Windows since version XP.

Single installer package for all keyboards. country/keyboards included are:
Benin - Bambara, Dioula, Hausa, Fulfulde
Botswana - Shona, Tswana
Burkina Faso - Bambara, Dioula, Hausa, Fulfulde
Congo - Bemba, Kirundi, Lingala
Côte dIvoire - Bambara, Baule, Fulfulde, Hausa
Ghana - Akan, Ewe, Ga, Hausa, Fula
Nigeria - Yoruba, Igbo, Hausa

Also includes Zimbabwe, Zambia, Uganda, Togo, Tanzania layouts.