Downloading SenchaSDKTools--Developer-Preview-1 3.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Sencha Inc. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software belongs to Developer Tools.
From the developer:
The Sencha SDK Tools is a suite of powerful tools that automate a large part of the application creation, development and building process.
With brand new capabilities for Sencha Touch 2, the SDK Tools can generate an app skeleton in seconds, create minified production-ready builds and even package your app for native app stores – all in one command.
You may want to check out more software for Mac, such as PowerGlot, ChIDE or flex sdk 3, which might be similar to SenchaSDKTools--Developer-Preview-1.