Most stable release here: https://github.com/farmerbriantee/AgOpenGPS/releases

Discussed in detail: https://discourse.agopengps.com/

*** Important ****

If you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights as Outlined in the GPLv3 License.

Ag Precision Mapping and Section Control Software

This software reads NMEA strings for the purpose of recording and mapping position information for Agricultural use. Also it has up to 16 sections of Section Control to control implements application of product preventing over-application.

Also ouputs Pure pursuit steer angles from reference line for AB line, AB Curve and Contour guidance. Auto Headland called UTurn on Curve and AB Line with loops for narrow equipment

Included is an application, and source folders, ino's for steering and rate control and a built in NMEA simulators.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.