Well, Catholics evangelize in all sorts of ways. Recently a lot of lay Catholics have taken to the web to promote their views on the internet. Personally, it was mainly thanks to Catholics on blogs, youtube and forums that I became at least somewhat catechized about the teachings of the Church.
Other than that there is generally speaking a lot of emphasis placed on service. Trying to reflect Christ through your actions, whether you’re helping the homeless or working with your co-workers. The big saying is “preach the Gospel daily, and when necessary, use words”.
There’s not really a lot of street preaching; although Catholics definitely can do this. It may not be common in America, but I saw a youtube video in the Philippines of a group of lay-Catholics who street preached on a weekly basis.
Another specific form of Evangelism might be participating in public prayer rallies (which are often held at abortion clinics). It’s a good place for a lot of sometimes anti-Catholic Christians to realize that Catholics are on the same page as them… at least in terms of abortion.
In general, I would say that it depends on the parish. A parish can have tons of groups and programs for evangelism outside of RCIA. I’ve heard people on these forums talk about a group (forget the name) in which Catholics go door to door. A more common way to go would be to look for a Catholic Bible Study, or find a group of people willing to start one… and see if any non-Catholics are interested.
And yes, you’re right. RCIA is perhaps the GO TO place for getting people of all stripes to learn about the Catholic Church. But, outside of that, just read your parish bulletin. Or just stay tuned to threads on this sub-forum
But… as far as I know, there’s no real limits on what you can do for evangelism. As long as you can get some parishoners on board (and possibly the priest depending on the situation) you’re good to go