Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
ImageJ - and Other Health Care
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates