These PostgreSQL logos are generated with GIMP. You can freely use them.

samb nail	size[bytes]	file name
	30290	Blended+DropShadows-PostgreSQL.gif
	24631	Chromed-PostgreSQL.gif
	3260	Circle-PostgreSQL.gif
	6689	Circle-PoweredbyPostgreSQL.gif
	1950	CircleEmboss-PostgreSQL.gif
	3845	CircleEmboss-PoweredbyPostgreSQL.gif
	76905	Crystal-PostgreSQL.gif
	56043	Crystal1-PostgreSQL.gif
	26668	EerieAlienGlows-PostgreSQL.gif
	51706	FibersSquaresTexured-PostgreSQL.gif
	57307	FrostyDropShadows-PostgreSQL.gif
	38303	GlowingHot-PostgreSQL.gif
	18621	HighlightedDropShadows-PostgreSQL.gif
	109791	NeonChangePostgreSQL.gif
	38993	NeonCyan-PostgreSQL.gif
	38386	NeonGreen-PostgreSQL.gif
	32472	NeonRed-PostgreSQL.gif
	57099	SOTA-CopperTrimChromed-PostgreSQL.gif
	51408	SOTA-GoldTrimChromed-PostgreSQL.gif
	16774	SimpleDropShadows-PostgreSQL.gif
	56882	TerraHexagonsTextured-PostgreSQL.gif
	32470	TracePerticles-PostgreSQL.gif
	2191	powered-by-postgresql.gif
	1575	pwby.gif
	2905	simpledropshadows-postgresql.gif