AvisynthEditor

AvisynthEditor is a simple utility designed to assist you in editing Avisynth scripts. Delivered inside a lightweight package, it comes with a forthright interface with clear and accessible options, which makes it suitable for any user type, regardless of their previous experience as far as Avisynth scripts are concerned.
It comprises a basic set of features meant to ease the work of the script writer.
Starting with the list of commonly used functions displayed within the main window and ending with the preview capabilities, it is designed to make your job as easy as possible.
Moreover, the editor features syntax highlighting, line numbering and auto-completion functionality, which significantly eases code writing and formatting. Additionally, you can insert comments within the code and use the search function to look for a specific keyword or navigate to a certain line within the code.
The integrated list of functions is broad, including various filters and options. For your convenience, clicking on any of them reveals the syntax and the type of arguments and variables. Filters can be sorted either by plugin name or by category, whichever you find more suitable for your needs.
It comes with encoding and decoding options, 3D convolution, functions for stream merging, cropping, trimming, stream converting, file resizing, plugin loading, deinterlacing and many more.
AvisynthEditor comes with internal and external preview modes, as well as AVS script registering options. Thanks to the help pane it provides, you can easily find out the syntax of each filter and its argument types and have your script ready in no time.