Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Telosys - Telosys is a lightweight Open Source code generator. Telosys allows to generate any kind of language (Java, Python, GoLang, PHP, JavaScript, TypeScript, C#, etc). It works without UML model. All the code generation templates are customizable.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
Lime Text - Lime Text is an open source text editor.