Sledge is a completely free and open source replacement for Valve’s Hammer Editor, with a focus on compatibility with both Goldsource and Source engines. The purpose of Sledge is to offer advanced editing features from later versions of Hammer and other editors and make them available to all users, regardless of which engine they choose to use.
Sledge uses the same file formats as Hammer does (RMF, MAP, VMF) and maps are compatible between both programs. The editing process is almost identical to Hammer, the hotkeys are the same, as well as many of the screen elements and dialogs. Switching to Sledge will not be difficult for users who are familiar with Hammer.
** Advantages of Sledge **
Sledge brings many editing features available in Hammer 4 into the Goldsource editing environment.
It is built using modern frameworks and libraries, and is tested on modern operating systems.
It is constantly being enhanced and new features are always being added.
It is open source, which means the source code is available to everybody to modify and improve.
** Current features of Sledge **
Runs on modern operating systems and graphics cards
Full support for Goldsource editing
Reads and writes RMF, MAP, VMF files
Complete compatibility with Hammer maps
Proper decimal precision for sub-grid geometry
Support for large maps
Support for multiple visgroups per object
Displays models from unextracted PAK files
Improved texture browser filtering and display options
A huge number of settings to customise to your liking
Sledge is currently in alpha stage, so it may be unstable and some features are missing. Missing features include:
Advanced compile options
Built-in support for prefabs/instances
Automatic detection of game configurations
Windows jump-list/shell integration
Arch and sphere brush types
** Screenshots **
Sledge is currently being developed by Penguinboy over at TWHL. If you find any bugs , or have any suggestions, please post them in THIS THREAD- it’s really only where he frequently checks up on. Please support this, it’s going to be fantastic when he’s finished. ** SOURCE SUPPORT IS NOT YET IN THE ALPHA BUT IS PLANNED **
You can also go to Sledge’s website here