If you thought United Way was your only option in workplace giving, then you should look into Community Shares of Colorado. If you want to determine where your charitable dollars will go (who better know than you what they want to support) then this is the place to work with.
A member of Partnership for Colorado, Community Shares offers over 200 charities in need of your support. They are an eclectic mix of children's programs, animal rights, advocacy groups, environmental groups and smaller nonprofits that you might otherwise not know about. And Community Shares allows you to select the nonprofit who gets your donation.
Workplace giving allows you to give a small allowance form each paycheck so the giving is virtually painless. If your employer does not currently participate int he Community Shares giving program, you might want to suggest that they do. it's a great way to give back to the community.