Carpenters, iron smiths and all those workmen and women who use tools pray in front of them on the Vishwakarma day. While cleaning my laptop just now I was thinking, it is good to respect, and pay homage to the tools that sustain you, that help you earn a living and bring food to the table and maintain a roof over you and your loved ones.
There is also a practical reason behind revering your tools and devoting a day to their upkeeping. You can use them for a long time. Your tools are your true gods.