Patreon - Patreon enables fans to give ongoing support to their favorite creators.
log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
Drip - Turn more website visitors into customers with crash course
Serilog - Backend Development and Utilities
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
LOGBack - Logging framework