curl is a command line tool for transferring files with URL syntax, supporting FTP, FTPS, SCP, SFTP, HTTP, HTTPS, TFTP, TELNET, DICT, LDAP, LDAPS and FILE. Curl supports HTTPS certificates, HTTP POST, HTTP PUT, FTP uploading, kerberos, HTTP form based upload, proxies, cookies, user+password authentication, file transfer resume, http proxy tunneling and a busload of other useful tricks

Red Hat free software

The Open Group works towards enabling access to integrated information within and between enterprises, based on open standards and global interoperability. It is a vendor-neutral and technology-neutral consortium that works with customers, suppliers, consortia and other standard bodies to capture, understand and address current and emerging requirements, establish policies and share best practices.

Linux Information Portal YoLinux includes informative tutorials and links to many Linux sites. Covers Linux topics from desktop to servers and from developers to users