- See dictionaries WordReference, FreeTranslation, and the RAE.
- Wiktionary: Appendix:Spanish irregular verb types, [[Category:Spanish conjugation-table templates]], Wiktionary:Inflection templates#Spanish
- RAE Panhispanico de Dudas appendix
- WR List of model -er verbs, -ar verbs, -ir verbs
- University of Chicago Spanish Dictionary appendix.
- Verbix conjugator
- 501 Spanish verb list (incomplete). Lacks: absolver, abstenerse, aburrir, acuchillar, acudir, adivinar, gradar, agravar, agregar, aguardar, alumbrarse, alzar, apoderarse, arrojar, articular, atreverse, bautizar, bendecir, caracterizar, cargar, certificar, chistar, componer, constituir, convenir, convertir, convocar, declarar, delinquir, denunciar, derribar, desayunarse (instead of desayunar), detenerse, dispensar, distinguir, ejecutar, empezar, encender, enfadarse, entender, enunciar, erguir, errar, esparcir, establecer, hallar (instead of haller), llover, morir, telegrafiar
