icurl is a packaging of Curl and Cygwin to offer a standalone transfer tool for Windows systems. it is just a yet another contribution to a large set of curl implementations.

curl is a popular command-line tool used to transfer data to and from servers using various protocols, including HTTP, HTTPS, FTP, and more. It stands for "Client URL" and is commonly used for downloading files. Cygwin is a Linux-like environment for Windows. It consists of a DLL (cygwin1.dll), which emulates substantial Linux API functionality, and a collection of tools.

Curl man page

Protocols supported

dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp

Features supported

alt-svc AsynchDNS brotli gsasl GSS-API HSTS HTTP2 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL threadsafe TLS-SRP UnixSockets zstd