gretl（意为Gnu Regression, Econometrics and Time-series Library，以此缩写作为软件名）是一种可以编纂和解析计量经济学数据的开放源代码软件。它可以和X-12-ARMA、TRAMO／SEATS和R语言一起使用。gretl用C语言写成，使用gnuplot制图。

gretl自身的文档格式是XML，但它还可输入Excel、Gnumeric、Stata、EViews、RATS、GNU Octave、Comma Separated Values、PcGive、JMulTi、SPSS和ASCII文档，也可以输出到GNU Octave、GNU R、JMulTi和PcGive文档格式。

gretl is an open-source statistical package, mainly for econometrics. The name is an acronym for Gnu Regression, Econometrics and Time-series Library.

It has a graphical user interface (GUI) and can be used together with TRAMO/SEATS, R, Stata, Python, Octave, and Ox. It is written in C, uses GTK+ as widget toolkit for creating its GUI, and uses gnuplot for generating graphs. As a complement to the GUI it also has a command-line interface.