Gusek is a SciTE editor to help you with your work, provide an open source LP/MILP IDE for Win32, packing a custom version of the SciTE editor linked to the GLPK standalone solver.

GUSEK can open multiple files simultaneously, using file extensions to identify them:
.mod: GMPL Model file (can contain problem data too);
.dat: GMPL Data file;
.out: GLPK Output file;
.mps: Free MPS / Fixed MPS Model file;
.lp: Cplex LP Model file;
Specific resources for GLPK models development are in the Tools menu. All others resources are from standard SciTE editor. The most useful commands can be called from keyword shortcuts, toolbar buttons and tab contextual menus.

The license of this software is Free, you can free download and free use this text editor software.