The Remix Tools are a set of three plugins: RMX Harmonizer, RMX Tuner, and RMX Scaler. While the Harmonizer irons out curve kinks, the Tuner and Scaler are indispensable tools for anyone working with Multiple Masters, and all for a mere 99 Euros.
Yanone’s genius SpeedPunk plugin produces a psychedelic visualisation of curvature, and helps you spot problems in your outlines. At twenty Euros, its price is a steal, and no Glyphs installation is complete without it.
Simon Cozens’s SuperTool does many things: It gives you real Tunni lines for editing curve segments, it has SpeedPunk built in, and it gives you both a vector simplification and curve harmonisation algorithm. And it is just fifty bucks.
Developed for Carrois Apostrophe, Kernkraft provides a fantastic way to speed up the kerning process. Read the docs carefully, and you will become a kerning champ in a snap. Get Kernkraft for free via the Window > Plugin Manager.
This tool helps you drag segments away from their original position but still keep them connected to their host path. Great for extruding serifs and spurs, fun to use. Install it for free via Window > Plugin Manager.
Straighten up your vectors with Red Arrows! It points at possible outline errors, like missing extremum points, empty segments, collinear vectors, or the dreaded zero handles. Get it for free via Window > Plugin Manager.
Displays the current glyph, under its own paths, but rotated or flipped. Useful for seeing if that lowercase o really is or is not symmetrical, and a godsend for geometric type design. Get it for free via Window > Plugin Manager.
Spot path problems easily with this extension to the View menu. It shows close-to-but-not-completely horizontal and vertical lines and handles, duplicate paths, zero handles, and crossing handles. Easy installation via Window > Plugin Manager.
Don’t miss this collection of useful scripts, adding functionality in all areas of font production. Make sure you read the read-me one-liners. And: it is all open source, so it makes for a great learning base in case you want to start writing your own scripts.
This set of Python scripts by Glyphs creator Georg Seifert (@schriftgestalt) should have a fixed spot in your Scripts folder. Among other things, it contains FontLab import and export macros, and a script that smartly sets kerning groups for selected glyphs.
Handy set of helper scripts by acclaimed type designer Toshi Omagari. Of special interest is the InDesign Tagged Text script, which puts glyphs (including all alternate glyphs that cannot directly be accessed via a Unicode) into a text that can be imported into InDesign for proofing.
Want to use Python for your Glyphs workflow? Then you need to know about the classes and objects provided by the Application Programming Interface (API). Bookmark this link and keep it under your pillow.
The Software Development Kit contains plugin templates, a scripting API documentation, the documentation of the .glyphs file format, and is continually expanded with more goodies that you can put to good use for expanding and tweaking the functionality of Glyphs.
If you are coding in Python, chances are you are using a text editor like TextMate, SublimeText, or Atom. As it so happens, here is a little GitHub repository with a bunch of useful Python snippets for exactly these editors.