Longer Informal and Semiformal Reports
http://www.csee.umbc.edu/~sherman/Courses/documents/
TR_how_to.html
This website gives some excellent advice on writing a technical report, covering how to write the thesis, the components of the technical report, and organization, as well as common mistakes to avoid.

Recommendations and Feasibility Reports
http://www.io.com/~hcexres/tcm1603/acchtml/feas.html
From the online textbook Online Technical Writing, this document describes feasibility reports in detail and includes several samples.

Proposals
http://www.io.com/~hcexres/tcm1603/acchtml/props.html
Also from Online Technical Writing, this document describes types of proposals, their organization and format, and the common sections in a proposal. Included are several sample proposals and a revision checklist.