By the way, if you're a regular-ol'-geek and wondering "I wonder if writing about technical topics could help me career-wise", the answer is "Absolutely yes." You can use blogging software but it probably isn't your benefit to adopt the blogging format of 500 ~ 1,000 word articles displayed in reverse chronological order about disconnected topics. Instead, you could make it a goal to write three pieces and polish them to a mirror shine.
(Related advice that I find myself saying frequently: If you publish OSS and expect to get anything via doing so, don't just drop the OSS on github. Spend the extra bit of time packing it into a site with a getting-started guide, a visual identity distinct from "Github rendering a Readme file", and the request that interested people $TAKE_THE_ACTION_YOU_WANT_THEM_TO_TAKE.