compact and fast Windows IDE for PHP development
BS Editor: Davors PHP Constructor is Compact and fast Windows IDE (Integrated Development Environment) for PHP development with:

Free-style windowed interface with configurable desktop and multiple edit windows, providing special PHP features
Advanced multipaged editor with Syntax Highlighting for several programming languages (PHP, HTML, CSS, XML, JS, SQL, ASP, Perl, Python, Java + custom highlighting), code completion, code hints and many other advanced options
Project management
PHP syntax checking and script interpretation
Project and Source Explorer
Project and/or script/page Run/Preview
Advanced code analysis (PHP, JS and HTML)
HTML WYSIWYG editor
FTP-based file publishing/synchronization
Code Templates - define your own parts of code (like HTML tags or function/class structures) to pick from a list and insert into script pressing Alt+C
In development: Internal PHP Script Debugger! No need for external debuggers.
In development: MySQL Administration and Interactive SQL Module
Although presumed to be used as PHP development tool (and offering some special PHP features), Davors PHP Constructor can be used to work on any other language based project since editing features are not limited to PHP only. You can use it to develop any kind of web sites requiring scripts, or build clean HTML pages, still using benefits of project management, syntax highlighting etc. you can free download Davor's PHP Constructor 4.5/5 now.