OpenAcs, or what is the same, Open Architecture Community System is a free open source package for developing web applications. Around OpenACS a community has been formed in which it works closely. There is debate, content management and other mechanisms. This is an advantage because it allows users to raise and resolve all kinds of doubts.
Web page creators will find in this package automated tests, scalable databases, code and schema updates, scripting systems to generate web pages from the database, templates where the presentation code is separated from the contents , etc. OpenAcs includes comprehensive documentation, something that is always appreciated, and scripts for chats, forums, calendars, webmail, etc.
You can free download OpenAcs 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.