PostgreSQL.
Flame-retardant equipment deployed here for what will be an incendiary thread. And it's ess-que-ell not sequel. :-) Harumph!
ROFL!!!! That alone is contentious enough to get us through several pages of debate/flame wars!
For the record, I've always referred to it as 'sequel'. Not passionate about it, just seems to roll off the tongue a bit easier spoken that way.
>>And it’s ess-que-ell not sequel.<<
I was a DB2 programmer back in the day and EVERYONE called it ess-que-ell. Then I was at a job interview at Microsoft about 6 years ago and one of the guys that interviewed me used both pronunciations, but for specific things. When we talked of mainframes and DB2, he pronounced it the old way. When dealing with Microsoft software, he called it Sequel. Who owns Microsoft ess-que-ell server? :-)