ASM is described as 'Account Services Manager is a web-based account manager for UNIX web hosts so that clients can manage services such as FTP accounts, POP3 accounts, Subdomains, Password-protected folders, etc. without having to email support' and is an app in the Development category. There are more than 25 alternatives to ASM for a variety of platforms, including Linux, Self-Hosted solutions, Online / Web-based, Mac and Windows. The best alternative is Webmin, which is both free and Open Source. Other great apps like ASM are cPanel (Paid), Ajenti (Free Personal, Open Source), Froxlor (Free, Open Source) and CentOS Web Panel (Freemium, Open Source).
CentOS Web Panel - Web control panel is designed for quick and easy management of (Dedicated & VPS) servers without of need to use ssh console for every little thing. There is lot's of options and features for server management in this control panel.
Sentora is an open-source web hosting control panel built specifically to work on a variety of Linux distributions. Sentora is licensed under the GPL and is a separately maintained fork of the original ZPanel project.
DirectAdmin is the easiest to use control panel. DirectAdmin is programmed to be the fastest running control panel available. DirectAdmin avoids downtime by automatically recovering from crashes. We offer lightning-fast support by phone, e-mail, forum, and live online chat.
ApisCP is a hosting platform for modern websites. Multi-tenant with support for PHP, Ruby, Node, Python, and Go projects. Automatic Let's Encrypt, passive monitoring, threat-deterrence, and Ansible-driven platform checks make administration easy.