Please note that 1.13.2 is the latest stable build across vanilla, spigot and bukkit.

SPIGOT

spigot-1.13.2
spigot-1.13.1
spigot-1.13
spigot-1.12.1
spigot-1.10-R0.1-SNAPSHOT-latest
spigot-1.10.2-R0.1-SNAPSHOT-latest
spigot-1.9.4-R0.1-SNAPSHOT-latest
spigot-1.9.2-R0.1-SNAPSHOT-latest
spigot-1.9-R0.1-SNAPSHOT-latest
spigot-1.8.8-R0.1-SNAPSHOT-latest
spigot-1.8.7-R0.1-SNAPSHOT-latest
spigot-1.8.6-R0.1-SNAPSHOT-latest
spigot-1.8.5-R0.1-SNAPSHOT-latest
spigot-1.8.4-R0.1-SNAPSHOT-latest
spigot-1.8.3-R0.1-SNAPSHOT-latest
spigot-1.8-R0.1-SNAPSHOT-latest
spigot-1.7.10-SNAPSHOT-b1657
spigot-1.7.9-R0.2-SNAPSHOT
spigot-1.7.8-R0.1-SNAPSHOT
spigot-1.7.5-R0.1-SNAPSHOT-1387
spigot-1.7.2-R0.4-SNAPSHOT-1339
spigot-1.6.4-R2.1-SNAPSHOT
spigot-1.6.2-R1.1-SNAPSHOT
spigot-1.5.2-R1.1-SNAPSHOT
spigot-1.5.1-R0.1-SNAPSHOT
spigot-1.4.7-R1.1-SNAPSHOT
spigot-1.4.6-R0.4-SNAPSHOT

CRAFTBUKKIT

craftbukkit-1.13.2
craftbukkit-1.13.1
craftbukkit-1.13
craftbukkit-1.12.2
craftbukkit-1.12.1
craftbukkit-1.12craftbukkit-1.11.2craftbukkit-1.11.1
craftbukkit-1.10.2-R0.1-SNAPSHOT-latest
craftbukkit-1.9.4-R0.1-SNAPSHOT-latest
craftbukkit-1.9.2-R0.1-SNAPSHOT-latest
craftbukkit-1.8.8-R0.1-SNAPSHOT-latest
craftbukkit-1.8.7-R0.1-SNAPSHOT-latest
craftbukkit-1.8.6-R0.1-SNAPSHOT-latest
craftbukkit-1.8.5-R0.1-SNAPSHOT-latest
craftbukkit-1.8-R0.1-SNAPSHOT-latest
craftbukkit-1.8.3-R0.1-SNAPSHOT-latest
craftbukkit-1.8.4-R0.1-SNAPSHOT-latest
craftbukkit-1.7.9-R0.2-SNAPSHOT
craftbukkit-1.7.8-R0.1-SNAPSHOT
craftbukkit-1.7.5-R0.1-20140402.020013-12
craftbukkit-1.6.2-R0.1-SNAPSHOT
craftbukkit-1.6.1-R0.1-SNAPSHOT
craftbukkit-1.5-R0.1-20130317.180842-21
craftbukkit-1.5.2-R1.0
craftbukkit-1.2.5-R5.1-SNAPSHOT
craftbukkit-1.2.4-R1.1-SNAPSHOT
craftbukkit-1.2.3-R0.3-SNAPSHOT
craftbukkit-1.1-R5-SNAPSHOT