I dug out all my old Planescape books, and this is what I found. I omitted The Great Modron March, because that one really does not fit what I am going with. Other than that (and Dungeon magazine, which may be impractical for me at this time), this should be a complete list. Let me know if I am missing any!
Love Letter; level Any; 12 pages; The Well of Worlds
Hard Time; level Any (low); 16 pages; The Well of Worlds
The Hunt; level up to 7th; 10 pages; The Well of Worlds
The Eternal Boundary; level 1-3; 32 pages; module
Arsenic; level 1-3; 2 pages; Planes of Chaos
Nuts; level 1-3; 2 pages; Planes of Chaos
Street Crew; level 1-3; 2 pages; Planes of Chaos
A Mouse-Eye View; level 1-3; 2 pages; Planes of Chaos
Snipe Hunt; level 1-3; 2 pages; Planes of Chaos
Little Lost Gear Spirit; level 1-4; 2 pages; Planes of Law
Scrambled Eggs; level 1-4; 2 pages; Planes of Law
Hot Time in Darkspine; level 1-4; 2 pages; Planes of Law
Ghost in the Machine; level 1-4; 2 pages; Planes of Law
A Crown of Light; level 1-4; 2 pages; Planes of Law
Into the Land of the Dead; level 1-4; 8 pages; Planes of Conflict
The Mazes; level 2-4; 10 pages; The Well of Worlds
Planewalkers; level 3-5; 18 pages; Tales From the Infinite Staircase
Lost Sovereignty; level 3-8; 16 pages; Tales From the Infinite Staircase
Winds of Change; level 4-5; 12 pages; Tales From the Infinite Staircase
Reflections; level 4-5; 16 pages; Tales From the Infinite Staircase
The Thuldanin Gargoyle; level 4-6; 10 pages; Doors to the Unknown
Lord of the Worms; level 4-6; 14 pages; Tales From the Infinite Staircase
The Dream Well; level 4-6; 14 pages; Tales From the Infinite Staircase
Wicked, Wicked Ways; level 4-7; 2 pages; Planes of Chaos
Party Reservations; level 4-7; 2 pages; Planes of Chaos
Deliverance; level 4-7; 2 pages; Planes of Chaos
Hoards of Trouble; level 4-7; 2 pages; Planes of Chaos
The Hammer and the Serpent; level 4-7; 2 pages; Planes of Chaos
Harbinger House; level 4-7; 64 pages; module
Something Wild; level 4-7; 64 pages; module
A Devil's Dream; level 5+; 15 pages; Tales From the Infinite Staircase
In Disarray; level 5-6; 14 pages; Tales From the Infinite Staircase
Logicus Prime; level 5-7; 8 pages; Doors to the Unknown
Recruiters; level 5-8; 18 pages; The Well of Worlds
Desert's Night; level 5-8; 2 pages; Planes of Law
Militancy Justifies the Means; level 5-8; 8 pages; Planes of Conflict
The Field of Nettles; level 5-8; 20 pages; Hellbound
The Deva Spark; level 5-9; 32 pages; module
Hand of Fate; level 5-9; 2 pages; Planes of Law
Chase; level 5-9; 2 pages; Planes of Law
Haywire; level 5-9; 2 pages; Planes of Law
A Gauntlet Thrown; level 5-9; 2 pages; Planes of Law
Fires of Dis; level 5-9; 64 pages; module
Prison Break; level 5-9; 6 pages; Planes of Conflict
Strange Bedfellows; level 6-9; 14 pages; Hellbound
Out of the Darkness; level 6-9; 118 pages; Dead Gods
Into the Light; level 6-9; 30 pages; Dead Gods
Squaring the Circle; level 6-10; 56 pages; Hellbound
A Reality Beyond; level 7-10; 8 pages; Doors to the Unknown
The Book of Lies; level 8+; 2 pages; Planes of Chaos
Treasure for the Taking; level 8+; 2 pages; Planes of Chaos
Steal Town; level 8+; 2 pages; Planes of Chaos
Mad Dog; level 8+; 2 pages; Planes of Chaos
The Fires of Ysgard; level 8+; 1 pages; Planes of Chaos
In the Abyss; level 8-10; 32 pages; module
Inner Workings; level 9+; 2 pages; Planes of Law
Blood Storm; level 9+; 10 pages; The Well of Worlds
People Under the Falls; level 9+; 8 pages; The Well of Worlds
Epona's Daughter; level 9-11; 16 pages; The Well of Worlds
Beyond the Forbidden Plateau; level 9-12; 9 pages; Planes of Conflict
How Many Rust Dragons Does it Take to Get to the Center of an Iron Cube?; level 10+; 2 pages; Planes of Law
Discovery; level 10+; 2 pages; Planes of Law
The End of Time; level 10+; 2 pages; Planes of Law
The Silent Aasimon; level 10+; 2 pages; Planes of Law
