is a collection of AutoLISP routines designed specifically to automate tedious tasks in AutoCAD. Created by a developer known as "Tlen," this library has gained a cult following in the CAD community because it solves common frustrations that native AutoCAD commands handle clumsily.
The most famous and trusted version comes from Lee Mac, a renowned AutoLISP programmer. His version is clean, well-documented, and completely free for personal use. autocad tlenlsp download free