BlitzMail allows you to set up your email account once and then use it to send emails or quick notes to an address of your choice. This comes in handy when you need to send a lot of things via email, because you are in a low connectivity area (e.g. subway) and want to remember things to look at later.
The Pro version also works when you are offline. BlitzMail Pro then queues your emails and allows you to send them later when you have connectivity again.
This app can be used, studied, shared and improved. It is fully Free Software (Open Source) licensed under the GNU Affero General Public License¹ version 3 or later. The source code can be obtained from github².
¹ AGPLv3+: https://www.gnu.org/licenses/agpl-3.0.html
² Source Code: https://github.com/grote/BlitzMail