CallButler 1.9.16 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
The program's installer files are commonly found as WOSI.CallButler.Manager.exe or CallButler Service Manager.exe etc. The following version: 1.9 is the most frequently downloaded one by the program users. The program lies within Communication Tools, more precisely Instant messaging. This free program is a product of Code Plex.
From the developer:
CallButler is a FREE Windows-based open source PBX, IVR and Auto-Attendant Phone System built on .NET. It was a commercially available product, but is now being put into Open Source.
You may want to check out more software, such as MessengerAmp, QuickWrite or Love Pack for Messenger, which might be similar to CallButler.