Abstract: Software Practice and Experience would like to thank the following individuals for their outstanding contributions as referees. Our success as a journal depends on the quality of our referees. We are very grateful to you all. Diego Alonso Felix Gomez Marmol Roberto Erick Lopez-Herrejon Michael Seufert Wesley Klewerton Guez Assunção Rocio Gonzalez-Diaz Arno Luppold Hossain Shahriar George Balatsouras Arnaud Gotlieb Stefano Marrone Helen Sharp Marco Balduzzi Paul Grefen Jabier Martinez Michal Siedlaczek Sebastian Banescu Mahmoud Hammad Iberia Mederios Danilo Silva Walter Bartosz Shilin He Andre Menolli Kari Smolander Eric Bodden Helena Holmström Olsson Philippe Merle Balwinder Sodhi Rodrigo Calheiros Johannes Holvitie Marjan Mernik Jeongju Sohn Jian Cao Nigel Horspool Fabrizio Milazzo Jacopo Soldani Marcelo Cataldo Rubing Huang Josh Milthorpe Hasan Sozer Carlos Cetina Jaehyun Hwang Deepti Mishra Mark Stamp K. Chandrasekaran Erik Jagroep Adel Nadjaran Toosi Vlado Stankovski Chao Chen Devki Jha Vittoria Nardone Neeraj Suri Gong Cheng Timothy Jones Smita Naval Mark D. Syer Yunja Choi Alexander Jordan Antonio Nebro Patanamon Thongtanunam Edward Chuah Eleanor Judd James Noble Suresh Thummalapenta Elder Cirilo Pradeeban Kathiravelu Martín Ochoa Dennis Titze Robert Clarisó Stephen Kell Marc-Oliver Pahl Mamadou K. Traoré Sylvan Clebsch Uday Khedker Laura Panizo Eray Tuzun Kendra Cooper Barbara Kitchenham Chris Parnin Mark van den Brand Luís Cruz-Filipe Jacques Klein Rui Pereira Jan Martijn van der Werf Jennifer Davis Alex Kogan Euripides G. M. Petrakis Andreea Vescan Ewen Denney Raghavendra Kune Radu Prodan Andreas Vogelsang Yvonne Dittrich Daniel Lemire Rick Rabiser Philipp Wieder Dapeng Dong Li Li Maria Alejandra Rodriguez Sossa Xingbo Wu Qiang Duan Laercio Lima Pilla Atanas Rountev Ramin Yahyapour Juan Durillo Taweetham Limpanuparb Kazi Sakib Rongjie Yan Jutta Eckstein Mario Linares-Vasquez Giorgos Saloustros Jifu Zhang Henry Edison Jin Liu Kristian Sandahl Lingming Zhang Sukhpal Singh Gill Jonathan Lockhart Kurt Schneider Justin Zobel Note that this is not an exhaustive list of 2018 referees. These referees gave outstanding service to the journal based on the criteria of quality, timeliness, and volume of reviews.