This addon enables selection of favourite recipes (recipes, diagrams, patterns, blueprints, formulae, praxes and designs). Selected recipes can be then filtered out using checkbox in the list header. This is an extension of the standard ESO UI so it won't work with addons that replace the standard crafting windows.
The interface is quite self explanatory.
1. You can mark recipe as favourite by selecting the icon on the left of the recipe label (see attached image).
2. To filter out all the marked recipes simply select the checkbox in the header (right next to the "Have Ingredients" checkbox).
The original idea for this addon was suggested by kindredspirit - thank you!