Congress has sources of information on the status of legislation related to the budget. The budget committees address overall Federal budget matters while the appropriations committees provide the funds that may be used by Federal agencies. Their web sites are:
Congress.gov is the official website for U.S. federal legislative information. The site is managed by the Library of Congress (LOC). The home page provides access to legislation, including appropriations.
Appropriations can be reached directly at appropriations status for FY 2016; this page has links to appropriations for other fiscal years.
House Committee on Appropriations. Upcoming hearings info.
The Congressional Budget Office produces independent analyses of budgetary and economic issues to support the Congressional budget process.