Here are collected a few example templates presented in the documentation of Module:Params.
- Params/doc/examples/Oxford comma
- Params/doc/examples/Oxford comma/doc
- Params/doc/examples/check for unknown parameters
- Params/doc/examples/check for unknown parameters/doc
- Params/doc/examples/enumerate
- Params/doc/examples/enumerate/doc
- Params/doc/examples/inline ordered list
- Params/doc/examples/inline ordered list/doc
- Params/doc/examples/list of authors
- Params/doc/examples/list of authors/author
- Params/doc/examples/list of authors/doc
- Params/doc/examples/trim and call
- Params/doc/examples/trim and call/doc
The same list is available here. You might be also interested in the testcases page.