Azuser by @Inzanit Azure SQL Server User Management
Carnac by @Code52 the Magnificent Keyboard Utility
Certify The Web by @webprofusion The GUI to manage free certificates from Let's Encrypt
Chocolatey GUI Chocolatey GUI is a user interface for Chocolatey (a Machine Package Manager for Windows)
CodeTrack by Nico Van Goethem CodeTrack is a versatile profiler with some extra tricks up its sleeve.
Espera by @flagbug
FolderSecurityViewer Easy to use NTFS permissions reporter to get all effective security owners of your data
Hearthstone-Deck-Tracker by @Epix37 HDT is an automatic deck tracker and manager for Hearthstone
Markdown Edit by @mike-ward A full-featured Markdown editor for Windows with an emphasis on content and keyboard shortcuts
Markdown Monster by @RickStrahl An extensible Markdown Editor, Viewer and Weblog Publisher for Windows
MarkPad by @Code52 a visual Markdown editor
Modern UI for WPF (MUI) Inspired by MahApps.Metro
myEcho iOS Dictation for Windows
NETworkManager by @BornToBeRoot A powerful tool for managing networks and troubleshoot network problems!
Papercut by @Jaben Simple Desktop SMTP Server / Email Receiver
SimpleMP by @punker76 Simple Music Player - SimpleMP - Keeps it simple and plays your music
Solutionizer by @thoemmi Creating ad-hoc solutions for Visual Studio
WinReform by @AKruimink A simple tool to help resize and relocate stubborn windows.
Xamarin Inspector Visualize and debug your live app
Xamarin Workbooks Workbooks is an interactive programming environment that’s perfect for experimentation, learning, and documentation: an educational tool for learning the myriad of .NET platforms, APIs, and libraries. Source