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Featured Partner

Founded in 1999, Melville-Schellmann is a full service provider for Act! and a developer of enhancement technologies for Act! since then.
Our product “ACTOptimum! +” is a complete suite of operative plugins and visualization tools for SQL queries from any database (Act!, ERP, Excel). It also contains a powerful script programming interface for Act! and a complete CTI solution.

Location: Germany
Contact: Email
Tel: +49 4102 803650

Act! Developer’s Lounge

The Act! Developer Lounge is focused on the Act! architecture and technologies. Created for the IT manager and/or developer and the end-user who wants to learn more about what makes Act! tick, the Act! Developer Lounge focuses on communication and collaboration though blogs, forums and downloads and more all at your fingertips.

All downloadable documents posted in this forum are subject to the Licence Agreement.

A copy of the licence agreement is also included as a Licence.txt file in the Packages.

By downloading any document, you are acknowledging acceptance of the license terms.


Visit the developer hub

Ready to start writing integrations, add-ons and tools for Act!? Access the API & SDK documentation and downloads here.


Learn about Act! architecture, security, integration and more.

Act! Add-on Solutions

Perhaps an add-on already exists that meets your needs. View our existing Act! Add-on Solutions.