Some fun things I did over the years:
- A multiuser/multitasking DOS-compatible OS... which ran on PC-XTs!
- A distributed inventory/orders system for a computer store chain. Online updates of MDB database content AND structure. In 1997.
- Access control system for an ISP. Kinda Rube Goldberg-ish. Lots of scripts that manipulate iptables to turn users to the login page, dhcpd to give thep IPs, cbq to assign them bandwidth etc.
- A security system for MS-DOS, implementing somewhat-Unix-style accounts and permissions.
- Clustering Asterisk PBXs for call centers.
- Autodialers with detection of human / answering machine / busy / bad number for (I'm going to Hell for this) active telemarketing. Please forgive me.
- A driver to integrate Skype into Asterisk. Even more Rube Goldberg-ish than the ISP login thing.
- Energy consumption billing through a proprietary board that "ticked" a bit in a parallel interface whenever X watts-hours had gone through path Y.
- Linux system-restore CDs.
- Satellite image acquiring through yet another proprietary expansion board, for Brazil's National Space Research Institute.
- REST services with Django.
- Remote system audits in C# using the OVAL language.
- For the retrocomputing fans out there: https://sourceforge.net/projects/cachars
- Lots more I sure forget about now.
Oh, and I just learned CUDA and Greenplum. They're neat. But I didn't get to use either in any project so far. :-/
Things I like for fun:
- Formula One and Indy racing. (You get brownie points if you guess what race my avatar is from.)
- Reading in general, mostly nonfiction.
- Retrocomputing and retrogaming.
- Traveling, preferably overseas.
- Sci-fi in general, and Star Trek in particular.
Q&A for professional and enthusiast programmers
Q&A for computer enthusiasts and power users
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Q&A for people studying math at any level and professionals in related fields
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Q&A for enthusiasts and power users of the Android operating system
Q&A for system and network administrators
Q&A for power users of web applications
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for science fiction and fantasy enthusiasts
Q&A for cartographers, geographers and GIS professionals
Q&A for information security professionals
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Q&A for programadores profissionais e entusiastas
Q&A for users and developers of hardware and software for Raspberry Pi
Q&A for professional programmers interested in conceptual questions about software development
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Q&A for Ubuntu users and developers