I've designed and developed elien in Processing. Its glyphs are generated by metaballs. A varying number of balls random sizes is overlain on a letter skeleton. The interactive application generating elien allows you to input text and alter different parameters – scale, spacing, density, contrast, levels and dissolve. This approach yields unlimited variations of styles and weights. You
may export the generated graphics in PDF Format.
A demo version is available here:
More infos about how elien works can be found here: