If you create technical documentation yourself or prefer to use a writing service, or you are in the process of selecting a help authoring tool for your project, look at the Indoition web-site.
Indoition is a team of experienced technical writers and communicators who provide a variety of quality services. These services include creation of new documentation, improvement of existing technical documentation, writing texts for user interfaces, revision of texts, and so on (you can visit this page for the full list of services).
You will find a number of checklists, helpful information on help authoring tools, screen capture utilities, and other related software. There are more than 250 useful links to resources for technical writers. By the way, you can download all the information as a PDF booklet!
Thus, Indoition is a great combination of useful tips and quality services that can be recommended to professional technical writers and software developers.