IT Asset Database

We are looking for an IT Asset Database to keep track of Server, Workstation, Routers, etc. We have looked at the free IT Asset Manager that is included with Zoho, but it is missing some functionality we need. We are a company that manages IT Assets for several companies. So we need a way to filter assets by company.

1. Full Index search for every text field
2. Revision history for previous values
3. Time stamps for change history
4. I would also like to ability to link related asset items and establish parent child dependencies

Here is the list of the types of Assets I would like to manage and the fields I want to track for each type

Server: Name, Company, Model, Location, Serial, Status, Active Date, Notes, Network Information, URL, Login Username/Password
Workstation: Name, Company, Model, Serial, Status, Active Date, Notes, Network Information, URL, Login Username/Password
Software Product: Name, Company, Status, Location of Software (Installs Directory, Web Download, Software Box)
Network Device: Name, Company, Model, Serial Number, Location, Status, URL, Login Username/Password
Server Application: Name, Company, Location, URL, Notes
Notes: Name, Company, Location, URL, Notes
Web-based Applciations: Name, Company, Location, URL, Notes
Mobile Devices: Name, Company, Model, Serial, Status, Active Date, Notes, Network Information, URL, Login Username/Password