Ge'ez
Ge'ez in itself is no longer a spoken vernacular, but its script is used as a liturgical language and adapted to write Amharic, Tigrinya, and Tigre.
Mandombe Writing (DR Congo)
Used for Lingala, Kikongo ya leta, Tshiluba and Swahili. Developed by Wabeladio Payi in 1978.
Vaï (Liberia and Sierra Leone)
Tifinagh Writing system used for Berber languages (Tamazight, Tamashek, etc.) of the Maghreb, Sahara, and Sahel regions. Photograph shows the Tifinagh alphabet on a wall in Chefchaouen, Morocco.
Ajamiyya / Adjami (Mali, Niger, Nigeria, Senegal, Mauritania) Used to write Wolof, Swahili, Songhai, Puular, Hausa, and Mandinka. Chart from Omniglot.com
Nsibidi (Nigeria, Cameroon) Ancient writing system used for Efik, Igbo and Ibibio people. They are classified as pictograms, used mainly for wall designs, swords, and tattoos. Chart from Omniglot.com
Bamum / Bamoun Writude (Cameroon) - developed by King Njoya in the Kingdom of Bamum around 1895. The picture shows Nji Oumarou Nchare teaching the Bamum script. Foumban, Cameroon. Photograph by Konrad Tuchdcherer, 2005.
Meroitic Script (Sudan)
It was used for the Meroitic language in the 3rd century BC, till the 5th century AD.
Ńdébê (Nigeria).
Mende Kikakui (Sierra Leone)
It was introduced in the 1920s, inspired by the Vaï sillabary and Arabic.
Adinkra Alphabet (Ghana, Ivory Coast) - consists of a simplified version of the Adinkra Symbols (created byNana Kwadwo Agyemang Adinkra, the King Gyaman people in the Ashanti region of Ghana from 1810 to 1820.), and used for Dagbani, Ewe and Ga. It was developed by Charles M. Korankye in 2015.
Mende Kikakui (Sierra Leone) - used for the Mende language, developed in 1971.
Nwagụ Aneke - developed by Nwagu Aneke for the Umuleri dialect of Igbo in the late 1950s. From Omniglot.com
Bété (Ivory Coast) - used for the Bété language, and developed by Frédéric Bruly Bouabré (shown in picture) in the 1950s. Photograph by Andé Magnin (1996).
Garay (Senegal, Guinea) - used mainly for the Wolof language, developed by Assane Faye in 1961.
Osmanya / Far Soomaali (Somalia) - used to transcribe the Somali language. Developed by Osman Yusuf Kenadid, used between the 20s and 70s of the 20th century, not used as much in current days.
isibheqe sohlamvu (Southern Africa) - created in the 2010s, used for Zulu, Xhosa, Sotho, Tswana.
Tafi (Nigeria) - used for Hausa, Igbo, Yoruba, developed in the 1970s. Chart from tafiwriting.com