Fundraise Up - The New Standard for Online Giving
Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.
GoFundMe - GoFundMe is a crowd-funding platform for fundraising one or multiple goals.
Devhints - TL;DR for developer documentation
Keela - Helping small nonprofits make a BIG impact!
OpenGraph.xyz - Check how search engines and social medias such as Google, Facebook, Twitter display your website