My main strenght is being extremely creative, always bringing new good solutions and ideas(but not ignoring the old walked paths where they proved their efficiency).
A good perspective over the IT field, capacity to be more than the executer programmer but also taking the role of choosing the right technologies, designing software arhitecture, QA, etc - and this is exactly what is needed for small freelance projects where the tasks usually handled by complete staff of a big software company cannot be replaced only by coding skills. The best way to convinge about my strengths before assigning a project or seing the done work would be to ask me few advices regarding your software project, that is for free and could help no matter who you choose to finalize it.