The true future ("will")

Regular endings (add to the infinitive): Irregular verbs (yo form given) Irregular verbs (grouped by type)

yo: é
tú: ás
él/ella/usted: á

nosotros/as: emos
vosotros/es: éis
ellos/ellas/ustedes: án

besaré, besarás, besará, besaremos, besaréis, besarán

tener: tendré
venir: vendré
poner: pondré
salir: saldré
decir: diré
valer: valdré
caber: cabré
haber: habré
saber: sabré
poder: podré
hacer: haré
querer: querré

"d" verbs (replace last vowel of infinitive with "d"):
tener, salir, venir, poner, valer

"-e" verbs (eliminate last "e" of infinitive)
poder, caber, saber, haber, querer

"-2" verbs (eliminate the "ce" or "ec")
decir, hacer

Click here for a more detailed explanation and differences with the other future modes.