下载可以很简单

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#.

WinSCP is a popular free SFTP and FTP client for Windows, a powerful file manager that will improve your productivity. It supports also Amazon S3, FTPS, SCP and WebDAV protocols, as well as copying between two local directories. Power users can automate WinSCP using .NET assembly.

Extremely fast and scalable Python FTP server library

FTP client for Node.js, supports FTPS over TLS, passive mode over IPv6, async/await, and Typescript.

ProFTPD source code

Platform independent c++ library providing ftp client functionality.

Multi protocol support for handling remote files like local ones in Visual Studio Code.

A polycloud .NET cloud storage abstraction layer. Provides Blob storage (AWS S3, GCP, FTP, SFTP, Azure Blob/File/Event Hub/Data Lake) and Messaging (AWS SQS, Azure Queue/ServiceBus). Supports .NET 5+ and .NET Standard 2.0+. Pure C#.

SFTP/SCP/FTP/FTPS/WebDAV/S3 client for Far Manager 3 (http://farmanager.com/)

gFTP is a free multithreaded file transfer client for *NIX based machines. 56 language translations available.

📁 Elegant FTP/FTPS/SFTP client.

a super FTP/FTPS client library for Rust with support for both passive and active mode

📦 Provides helper classes and methods to manage FTP files in an OOP way.

Yo! Warez scene scriptz!

Small PowerShell module with FTPS/SFTP functionality

Simple SFTP / FTP deployment with NodeJS.

FTP proxy support for ProFTPD

⚡ An FTP/FTPS/SFTP client with modern API.

FileManager replacement for Local, iCloud and Remote (WebDAV/FTP/Dropbox/OneDrive) files -- Swift