Communications

ABCUpload .NET
ASP.NET file upload component with progress bar and file corruption auto-fixing. Unicode and MacBinary compatible. By WebSupergoo.
http://www.websupergoo.com/abcupload.net-1.htm

AlertPOP .NET
Non-intrusive popup messages similar to MSN Instant Messenger and Yahoo Messenger.
http://www.componentdesigns.com/products/alertpop.asp

aspNetDns
Perform DNS lookups. Includes synchronous and asynchronous method calls. By Advanced Intellect.
http://www.aspnetdns.com/

aspNetMime
Parse MIME and Email messages. Decodes quoted printable, MIME body parts, and email properties. Stream email body parts to ASP.NET webpages. By Advanced Intellect.
http://www.aspnetmime.com/

ComponentSpace .NET Internet Suite
Consists of over 150 classes covering the most popular Internet protocols and includes DNS, FTP, ICMP, NTP, SMTP Email Checker, Trace Route and Who Is components. [Commercial]
http://www.componentspace.com/internetsuite.aspx

DNS .NET
Query DNS servers for MX and all the other resource record types defined by RFC-1034 and RFC-1035. By ComponentSpace.
http://www.componentspace.com/dns.aspx

dotEtiveFTP
Transfer, rename, delete, make, enumerate files and folders synchronously and asynchronously. It supports Socks 4/4A/5, IPv6, transfers resuming, recusive folder transfer, custom commands, transfers tracking, and FXP data transfer for faster backups.
http://www.etive.com/software/dotEtiveFTP/

dotEtiveSocket
A derivate of the original Socket. It compatible with Socks 4, 4A, and 5.
http://www.etive.com/software/dotEtiveSocket/

edtFTPnet
A FTP client library written in C# for .NET applications. [Open source, LGPL]
http://www.enterprisedt.com/products/edtftpnet/overview.html

FirstFloor.MSN
Msn Messenger object model for the .NET platform.
http://www.1stfloor.nl/

FTP for BizTalk Server
Configure a BizTalk Server Message Port to use the FTP Application Integration Component (AIC) and upload BizTalk Server messages to an FTP server. By ComponentSpace.
http://www.componentspace.com/ftpbts.aspx

FTP .NET
FTP client functionality. By ComponentSpace.
http://www.componentspace.com/ftp.aspx

Genuine Channels
Use bidirectional non-blocking GTCP, GHTTP, Shared Memory and GUDP channels with IP multicasting support.
http://www.genuinechannels.com/

ICMP .NET
Send ICMP echo messages and receive echo replies. By ComponentSpace.
http://www.componentspace.com/icmp.aspx

Internet Time .NET
Retrieve the date and time from NTP time servers. By ComponentSpace.
http://www.componentspace.com/internettime.aspx

IP*Works! .NET Edition
A collection of more than 30 IP networking components written in C#, including HTTP, SMTP, Whois, SOAP and Telnet. By /n software, Inc.
http://www.nsoftware.com/products/showprod.aspx?part=IPN5-A

.NET CVS Library (NetCvsLib)
A CVS client library written entirely in C# for the .NET platform. It is implemented as an assembly, and thus can easily be incorporated into other projects. [LGPL]
http://sourceforge.net/projects/sharpcvslib/

Rebex FTP.NET
Communicate with any FTP server in your .NET programs. Sync, Async and all common proxy servers supported.
http://www.rebex.net/ftp.net/

Rebex Time.NET
A SNTP/NTP time synchronization library for .NET and .NET Compact Framework. By Rebex.
http://www.rebex.net/time.net/

Sax.net Communications
Serial Communications Library for the Microsoft .NET Framework.
http://www.sax.net/framework/communications/

Smilla .NET Communication Library
An NNTP protocol library written in C# and distributed under the terms of the GNU Lesser General Public License.
http://www.smilla.ru/

Trace Route .NET
Perform Internet route tracing to determine network delays and topology. By ComponentSpace.
http://www.componentspace.com/traceroute.aspx

Who Is .NET
Lookup domain name registration and other information. By ComponentSpace.
http://www.componentspace.com/whois.aspx

wodSFTP.NET
Transfer data securely over SSH layer using AES, DES, and BLOWFISH encryption. By WeOnlyDo! Software. [Commercial]
http://www.weonlydo.com/index.asp?showform=SFTP.NET

wodSSH.NET
Client side .NET component for Telnet and SSH protocol. By WeOnlyDo! Software. [Commercial, open source]
http://www.weonlydo.com/index.asp?showform=SSH.NET