Skip to content
You must be logged in to sponsor LettError

Become a sponsor to Erik van Blokland

I make typefaces and tools to make typefaces. It is a small industry, so it is necessary to work on our own tools, formats and infrastructure. You can see my design work on LettError.com and my (past) interpolation tools on Superpolator.com. I make smaller and bigger extensions for the RoboFont editor. I teach type design at the TypeMedia master at the Royal Academy of Art in The Hague.

www / mastodon / instagram

This account is for my own projects such as MutatorMath - an implementation of multidimensional interpolation for type, similar to, but independent of the algorithms used for variable fonts, generating UFOs with MutatorMath or VarLib with UFOOperator, a formal description and detector of problems with designspacesDesignspaceProblems, a toy to get started with sketching and drawing: TypeCooker.

This is a useful project together with Frederik Berlaen: GlyphNameFormatter: a thing that generates glyph names for Unicode characters.

Robofont extensions: SymmetricRoundShapeDrawingTool, EditThatNextMaster and DesignSpaceEditor2

A lot of people contribute to the RoboTools and it needs its own sponsor account. Robotools is the central hub that maintains important packages such as FontParts, Defcon and Vanilla

Current sponsors 11

@nicksherman
@typoman
@benkiel
@ryanbugden
@djrrb
@andyclymer
@jesseragan
@XYZ-Type
@ilyaruderman
@matterofsorts
Private Sponsor
Past sponsors 2
@connordavenport
@arialcrime

Featured work

  1. LettError/MutatorMath

    Python library for piecewise linear interpolation in multiple dimensions with multiple, arbitrarily placed, masters.

    Python 142
  2. LettError/glyphNameFormatter

    Generate list of glyphnames from unicode names.

    Python 75
  3. LettError/TypeCooker

    A small web tool for creating recipes for sketching and exploring type.

    JavaScript 25
  4. LettError/designSpaceRoboFontExtension

    A RoboFont extension for creating and editing designspace documents.

    Python 30
  5. LettError/ufoProcessor

    Python package based on fontTools.designSpaceLib for processing and generating UFO files.

    Python 26
  6. LettError/editThatNextMasterRoboFontExtension

    A RoboFont extension that makes switching glyph, space or font windows super easy.

    Python 5

Select a tier

$ a month

Choose a custom amount.

$5 a month

Select

Do you use some of my RF extensions every day? If you find my tools useful beyond experimentation or education, let me know!

$25 a month

Select

If you find my tools useful beyond experimentation or education, let me know!