[kusmi]

Alfresco is an open source Enterprise content management software which has frontend UI called Alfresco Share. The installation is simple using their all inclusive executable which bundles the server, database, and Solr for searching any and all data. It also has this concept of business workflows which you say is a pain point for you. Each document can have workflows assigned to it at which point it has a life of it's own, passing from user to user, emailing itself, tagging itself, etc. There is a learning curve on the dev side, especially if you aren't Java savvy, but once you get the hang of it it's very powerful. I've personally written an API in Lua for syncing documents. I assign bot accounts from the Share UI which are given permission to crawl and sync directories to bot accounts on the server (origin server or external server), and each bot has a job to do on each document it gets, for which it writes and dispatches a service with systemd, then uploads the processed documents back to alfresco. And this is probably 1% of what Alfresco is actually capable of (and my implemention reeks of hackiness, because I hate Java). A team of devs is bound to get more use out of it.