The following are the links I check on the Vatican web site to compose The Weekly Benedict.

Major (but less predictable) documents:

• CONSTITUTION: Apostolic Constitutions
• EXHORTATION: Apostolic Exhortations
• APOSTOLIC LETTER: Apostolic Letters
• ENCYCLICAL: Encyclicals

Frequently recurring documents:  

• ANGELUS: 2011
• AUDIENCE: 2011
• HOMILY: 2011
• LETTER: 2011
• MESSAGE: 2011
• SPEECH: Oct. 2011 | Nov. 2011 | Dec. 2011

Periodically recurring documents:

• PRAYER: Prayers
• VOYAGE DOCUMENT: Apostolic Voyages Inside Italy
• VOYAGE DOCUMENT: Apostolic Voyages Outside Italy
• MESSAGE: Urbi et Orbi (given for Christmas and Easter)
• MESSAGE: Lent (released late in the previous year, e.g., Oct.-Dec.)
• MESSAGE: World Communications Day (May-June-ish)
• MESSAGE: World Day for Consecrated (Feb. 2)
• MESSAGE: World Day for Migrants and Refugees (late in year; e.g., Aug.-Oct.)
• MESSAGE: World Day of Peace (Dec.
• MESSAGE: World Day of Prayer for Vocations (Varies; has been between Nov. and Feb. in recent years)
• MESSAGE: World Day of the Sick (Varies; has been between Nov. and Feb. in recent years)
• MESSAGE: World Food Day (Oct.)
• MESSAGE: World Mission Day (not predictable from recent history)
• MESSAGE: World Youth Day (includes the annual, "off-year" celebrations)