There are many books published by the Commonwealth of Pennsylvania called "Pennsylvania Archives". You can find many by using this link.
These are some that I have found and indexed to make it easier to find information:
Volume 1 (Series?) - Pennsylvania Marriages Prior to 1810. Marriages recorded by the Registrar General and marriages recorded by the following churches:
Paxtang and Derry Churches
In Philadelphia: Christ Church, Swedes' Church, German Reformed Church, and First Baptist Church
In Carlisle: First Presbyterian Church
In Chester: St. Paul's Episcopal Church
In Falkner Swamp: Reformed Church
In New Hanover: Lutheran Church
Volume 3 (Series?) - Colonial Records of Pennsylvania
Second Series Vol. 3 Part 2 - Papers relating to the War of the Revolution
Second Series Vol. 3 Part 3 - Names of Persons who Took the Oath of Allegiance to the State of Pennsylvania between the years 1776 and 1794, Papers relating to the War of the Revolution 1777.
Second Series Vol. 4 - What is known as the Whiskey Insurrection of Western Pennsylvania, Col. Proctor's Journal, Defence of the Frontiers
Second Series Vol. 5 - Papers relating to the Colonies on the Delaware
Second Series Vol. 7 - Papers relating to provincial affairs
Second Series Vol. 8 - Journals and Diaries of the War of the Revolution
Second Series Vol. 16 Part 2 - Pennsylvania and Maryland boundary question
Second Series Vol 17 - Names of Foreigners who took the Oath of Allegiance to the Province and State of Pennsylvania, 1727-1775, with the Foreign Arrivals, 1786-1808.
Second Series Vol. 18 Part 1 - Contents: Minutes of the Susquehanna Company, An Examination of the Connecticut Claim, Connecticut Records examined by Pennsylvania, The Dutch Records of New Netherlands, Letters form the Pennsylvania Claimants, Letters from Secretary of Land Office, Letters from the Commissioners 1810, Miscellaneous Papers relating to the Wyoming Controversy, Index
Third Series Vol. 2 - Minutes of the Board of Property and other references to lands in Pennsylvania including proprietary (old) rights.
Third Series Vol. 4 - Draughts of the proprietary manors (maps)
Third Series Vol. 5 - State of the Accounts of the County Lieutenants during the War of the Revolution 1777-1789, Vol. 1
Third Series Vol. 7 - State of the Accounts of the County Lieutenants during the War of the Revolution 1777-1789
Third Series Vol. 12 - Chester County tax lists 1774-1785
Third Series Vol. 14 - Part 1 - Part 2 Philadelphia tax and land lists
Third Series Vol. 15 - Tax List, Philadelphia 1779-1781
Third Series Vol. 17 - Part 1 Lancaster tax lists 1771-1782
Third Series Vol. 27 - Index to Volume 1 A-C
Third Series Vol. 28 - Part 1 - Part 2 Index G-J
Third Series Vol. 29 - Part 1 Index to volumes 11-26 Letters K-R
Fourth Series Vol. 2 - Papers of the Governors 1747-1759
Fourth Series Vol. 3 - Papers of the Governors 1759-1785
Fourth Series Vol. 5 - Papers of the Governors 1817-1832
Fourth Series Vol. 11 - Papers of the Governors 1891-1897
Fifth Series Vol 1 - Officer and Soldiers in the service of the Province of Pennsylvania 1744-1765 and Muster Rolls of the Pennsylvania Navy 1776-1779
Sixth Series
Volume 5 Part 1 Muster and Pay Rolls Pennsylvania Militia 1790-1800
Volume 6 - Egypt Reformed Church of Lehigh County Records, Pennsylvania Marriage Licenses 1784-86
Volume 9 - Miscellaneous Paper 1812-14, Drafted Troops 1812-14
Volume 10 - Expenditures by the State
Volume 11 - Election Returns
Volume 14 Memorandum book of Dr. John Ewing with account of a journey to settle the boundary of Penna. May 1784
Volume 15 - Part 1 - Index A-E
Seventh Series (contains the index for the Sixth Series)
Volume 1 - Letters A-D
Other Unknown or No Series
Volume 9 - by Frank Reeder, Secretary of the Commonwealth, 1896.
Volume 11 - by Samuel Hazard, 1855. Contains various correspondence from 1786 to 1790.