The following is a collection of online Festschriften hosted by the ILLC:

• Vriendenboek ofwel Liber Amicorum ter gelegenheid van het afscheid van Dick de Jongh
• JFAK, a collection of essays dedicated to Johan van Benthem on the occasion of his 50th birthday
• M60: Celebration event in honour of Martin Stokhof
• The dynamic, inquisitive, and visionary life of ϕ, ?ϕ, and ◇ϕ: A festschrift for Jeroen Groenendijk, Martin Stokhof, and Frank Veltman
• J65: Celebration event in honour of Johan van Benthem
• J70: Celebration event in honour of Johan van Benthem
• D80: Celebration event in honour of Dick de Jongh

Also of interest may be the list of ILLC Valedictories and Inaugurals.