Spiekermann has designed many commercial typefaces as well as typefaces as part of corporate design programmes.

Berliner Grotesk (original is from 1913, digitization is from c. 1978)
Lo-Type (original is from 1911/14, digitization is from 1980)
ITC Officina Sans (1990)
ITC Officina Serif (1990)
FF Meta (1991–1998)
FF Govan (2001)
FF Info (2000)
Nokia Sans (2002-2011, corporate typeface for Nokia and the default UI font for Symbian S60 smartphones)
FF Unit (2003)
FF Meta Serif (with Christian Schwartz and Kris Sowersby, 2007)
FF Unit Slab (with Christian Schwartz and Kris Sowersby, 2009)
Fira Sans (designed in collaboration with Ralph Carrois) for Firefox OS, released in 2013 under the SIL Open Font License)
Spiekermann co-authored Stop Stealing Sheep & Find Out How Type Works.
He also participated in the creation of numerous corporate identities and other works, including redesigns of the publications The Economist and Reason.

Spiekermann also appeared in the documentary Helvetica.
Spiekermann has designed many commercial typefaces as well as typefaces as part of corporate design programmes.
Berliner Grotesk (original is from 1913, digitization is from c. 1978)
Lo-Type (original is from 1911/14, digitization is from 1980)
ITC Officina Sans (1990)
ITC Officina Serif (1990)
FF Meta (1991–1998)
FF Govan (2001)
FF Info (2000)
Nokia Sans (2002-2011, corporate typeface for Nokia and the default UI font for Symbian S60 smartphones)
FF Unit (2003)
FF Meta Serif (with Christian Schwartz and Kris Sowersby, 2007)
FF Unit Slab (with Christian Schwartz and Kris Sowersby, 2009)
Fira Sans (designed in collaboration with Ralph Carrois) for Firefox OS, released in 2013 under the SIL Open Font License)
Spiekermann co-authored Stop Stealing Sheep & Find Out How Type Works. He also participated in the creation of numerous corporate identities and other works, including redesigns of the publications The Economist and Reason.
Spiekermann also appeared in the documentary Helvetica.
Erik Spiekermann