KnifeLemon / Filee

Free, open-source file converter. Convert 255 formats offline by drag & drop — images, PDF, Word, Excel, PowerPoint, HWP/HWPX, video, audio, e-books and archives. No upload, no Office needed.

ShareX / ShareX

Free, open-source Windows app for screen capture, screen and GIF recording, annotation, OCR, and uploading files to many destinations.

i3sam / OrbitDrop

Drag files in Windows Explorer, tap Shift, and pick an action from a radial wheel at your cursor. Convert, edit and manage files locally. No app window, no uploads.

SnapXL / SnapX

SnapX is a free, open-source, cross-platform tool that lets you capture or record any area of your screen and instantly share it with a single keypress. Upload images, videos, text, and more to multiple supported destinations—all with ease. ShareX fork

robinrodricks / FluentFTP

An FTP and FTPS client for .NET & .NET Standard, optimized for speed. Provides extensive FTP commands, File uploads/downloads, SSL/TLS connections, Automatic directory listing parsing, File hashing/checksums, File permissions/CHMOD, FTP proxies, FXP support, UTF-8 support, Async/await support, Powershell support and more. Written entirely in C#.

rana-gmbh / NetFluss

A light-weight & open-source menubar app that shows current upload & download speed plus the top apps using bandwidth