Openkore

OpenKore is a community-maintained descendant of Solos Kore, a custom client and an advanced automated assistant for the MMORPG Ragnarok Online. It's free and open source software licensed under GNU General Public License. OpenKore is mainly written in Perl, but some code is also in C++ XS modules. The Perl interpreter allows for a cross-platform usability and an ability to work with the source code without recompiling or even interrupting the program. OpenKore is not associated with Gravity (developers of Ragnarok Online). Developers work on the project pseudonymously, mostly due to privacy issues or internet gaming community traditions.