CoverMe helps you find the most impactful areas to increase test coverage. It sorts functions by how often they are called in Wikimedia production, and annotates them with how much test coverage each has. You can sort by repository and entry point (index.php, api.php, etc.).
Source code available under the terms of the AGPL v3, or any later version. Loaded in 0.16 seconds using PHP 7.2.3-1+0~20180306120016.19+stretch~1.gbp81bf3b.