Acmemail: POP3 webmail software written in Perl, with full support for MIME. [GPL]
Advanced Webmail: Coldfusion-based webmail system with IMAP4 support. [Commercial]
Advox Omnigate: A Windows-based webmail solution for ISP and Corporate. [Commercial]
AnyEMail: Perl program to read/send email from a POP3 email account. [Commercial]
Atmail: A perl-based feature-rich web email system supporting access via web, WAP, POP3 or IMAP. Fully customizable, with web-admin, scheduler, migration scripts and Unix/Windows technical support. [Commercial]
Auto-EmailPro: Simplifies the process of offering free Web-based e-mail. For mod_perl. [Commercial]
Caudium Mail (CAMAS): Webmail system based on IMHO, designed to run with Caudium Webservers. Designed with the ISP in mind, it's scalable and free to use. [GPL]
EMU Mail: Programs to provide a web interface for accessing a POP3 and IMAP email account. Free version includes banner ads, paid versions don't. [Commercial]
IMHO: IMHO is a IMAP webmail program for the Roxen webserver. [GPL]
iNetMail: A web-based software module for online mail management. It helps you check and organize your Internet mail through your Web Browser, from an IIS server. [Commercial]
MailMan: Full-featured perl based web interface for POP3 email accounts. [Commercial]
Merak Webmail: Secure webmail server software for Windows, providing web client access to any POP3 and SMTP server. It includes a built-in HTTP webmail server, customizable email client with file upload, antivirus protection and spam filter. [Commercial]
NetWin WebMail: Web interface software for accessing POP3 and IMAP email accounts. Available for a range of platforms. [Commercial]
Open WebMail: A perl-based webmail system designed to manage very large mail folder files in a memory efficient way. [GPL]
OpenPGP Webmail: Send-only webmail system with support for encryption using GnuPG, and key retrieval. [GPL]
Twiggi: A customized version of Twig with additional features, designed to behave like Outlook. [GPL]
WebMail: Provides access to LAN-based email over the Web with most browsers, from a Windows-based server. [Commercial]
Webmail Pro: Webmail Pro is a robust, reliable, and feature-packed web-based email client driven by ColdFusion. Webmail Pro offers a whole suite of personalized, database-driven features. [Commercial]
WebmailASP: Multiuser webmail ASP script works like a desktop email client. Includes dynamic tree of folders, attachments, HTML-message display, contact books and search. All information moved/copied from POP3 and stored in database. [Commercial]
WING: Web IMAP NNTP Gateway, an open source Apache/mod_perl based system which allows users to access email held on an IMAP server via any web browser. [Free]
XandMail: Developers of messaging applications technology for companies and organizations.