Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 776 679
2) Placement test : grammar for beginners (anonyme) 5 988 833
3) A/AN (webmaster) 5 363 393
4) Auxiliary BE (webmaster) 3 223 353
5) Present continuous (webmaster) 2 998 179
6) Present simple (webmaster) 2 910 953
7) Present simple (webmaster) 2 596 386
8) Present continuous (webmaster) 2 432 386
9) Adjectives (webmaster) 2 093 021
10) A/an (anonyme) 2 014 388
11) Present perfect simple (webmaster) 1 641 341
12) Preterite (webmaster) 1 625 553
13) Vocabulary - Placement test (bridg) 1 618 759
14) Preterite (webmaster) 1 445 833
15) Short placement test (webmaster) 1 443 194
16) To be (bridg) 1 405 724
17) What time is it? (webmaster) 1 348 715
18) Present perfect (webmaster) 1 344 533
19) The alphabet in English (webmaster) 1 320 566
20) Adjectives (anonyme) 1 215 415
21) What time is it? (webmaster) 1 207 331
22) Numbers (webmaster) 1 188 312
23) 'A' ou 'An' (anonyme) 1 174 795
24) Two presents: present continuous, present simple (webmaster) 1 148 735
25) To be (bridg) 1 145 105
26) Comparatives / Superlatives (webmaster) 1 102 365
27) Numbers (webmaster) 1 070 362
28) CAN / MUST (webmaster) 1 058 155
29) THE/ A / AN / nothing (webmaster) 1 032 689
30) Comparatives (webmaster) 1 006 826
31) Family life (bridg) 1 000 382
32) Numbers > 100 (webmaster) 986 079
33) Future (going to/will/present continuous) (anonyme) 963 195
34) Plural (webmaster) 955 411
35) Superlatives (webmaster) 874 805
36) Adjectives (anonyme) 874 443
37) Simple present (bridg) 853 417
38) Spelled words N°1 (bridg) 849 816
39) Placement test beginners: Check your spelling (anonyme) 829 895
40) Introducing oneself (webmaster) 826 967
41) Adverbs of frequency (anonyme) 816 737
42) Family (bridg) 784 414
43) General test-End of high school / Beginning of university (webmaster) 782 459
44) Present simple (anonyme) 779 546
45) Frequency adverbs (webmaster) 777 501
46) Present BE + Ving (bridg) 764 650
47) Genitive (webmaster) 723 321
48) Family tree (anonyme) 719 120
49) Passive form (anonyme) 719 081
50) Preterite: simple or continuous? (webmaster) 716 120
51) Placement test (beginners) (lili73) 700 665
52) Past simple or present perfect (anonyme) 693 148
53) Future (webmaster) 675 648
54) 2 Preterites (webmaster) 661 561
55) Present perfect simple (bridg) 659 743
56) Preterite (webmaster) 619 854
57) List of 200 irregular verbs and audio (bridg) 615 700
58) Modals (webmaster) 612 472
59) Spelled words N°2 (bridg) 608 920
60) Height (webmaster) 606 157
61) Modals (webmaster) 604 697
62) Articles a / an / the (anonyme) 596 747
63) Plural forms (bridg) 577 139
64) Nationalities (webmaster) 574 022
65) Past continuous / Past simple (anonyme) 565 397
66) Irregular plurals (bridg) 553 350
67) Two presents: simple and continuous (webmaster) 549 318
68) Preterite (bridg) 548 683
69) Superlatives (frapedur) 537 596
70) Vocabulary: greeting people (here4u) 536 443
71) Give your opinion (bridg) 531 692
72) Adverbs of Frequency (bridg) 516 767
73) Present simple or continuous (anonyme) 509 986
74) Present perfect / preterite ? (anonyme) 508 552
75) Possessive case (anonyme) 480 338
76) Countries & nationalities (bridg) 473 199
77) 'The' or nothing? (webmaster) 471 077
78) Introducing oneself (easy) (webmaster) 470 581
79) Past tenses (bridg) 470 450
80) Passive voice (webmaster) 462 707
81) Present Simple vs. Past Simple (anonyme) 456 277
82) Questions : how to ask them (anonyme) 448 032
83) General Test II / End of high school / Beginning of universi (webmaster) 445 976
84) IN, ON, AT or TO? (webmaster) 444 818
85) Relative pronouns (webmaster) 444 032
86) Comparative of superiority (anonyme) 438 094
87) How to pronounce the final -ED? (past simple) (webmaster) 437 174
88) Relative clauses (webmaster) 423 049
89) Sounds: [h] (webmaster) 419 380
90) Comparative (anonyme) 413 072
91) A/an/Ø (bridg) 398 463
92) Past simple (anonyme) 396 005
93) Future simple (anonyme) 395 988
94) This / That / These / Those (webmaster) 392 340
95) Conditional (webmaster) 391 401
96) Passive voice (anonyme) 390 142
97) Comparing (webmaster) 387 862
98) Can / could/ may/ might (woodyrun) 379 133
99) Present perfect or past tense (anonyme) 376 737
100) Much, many, little and few (felin) 372 298
101) Personal pronouns (anonyme) 371 230
102) Preterite continuous (BE + -ING) (webmaster) 368 661
103) Some, any, no, enough, too/too much/too many (webmaster) 367 973
104) Genitive case (bridg) 367 748
105) Confusing words - Placement test (bridg) 364 463
106) Irregular verbs (webmaster) 363 361
107) Numbers from 1 to 10 (anonyme) 361 403
108) Past perfect simple, past perfect continuous (anonyme) 360 796
109) Present continuous or present simple (webmaster) 359 425
110) Present perfect or preterite? (anonyme) 356 285
111) Simple Past : regular verbs (anonyme) 352 462
112) Comparative Adjectives (bridg) 352 050
113) Who, Whom, Which, or Whose? (anonyme) 348 569
114) Past simple (video) (anonyme) 348 125
115) Past simple or past continuous (anonyme) 341 723
116) While / When (anonyme) 338 153
117) What time is it? (webmaster) 337 596
118) Modals (tinou) 336 356
119) Modal: may/might (anonyme) 334 028
120) Cardinal and ordinal numbers (anonyme) 328 575
121) The superlative (anonyme) 324 712
122) Possessive adjectives and pronouns (woodyrun) 323 992
123) How to talk about the weather (lili73) 320 864
124) Since and for (anonyme) 318 510
125) Flags (webmaster) 317 409
126) Irregular verbs (bridg) 315 828
127) Prepositions - in, on, at (anonyme) 313 996
128) Pronouns (woodyrun) 313 211
129) Tenses (anonyme) 311 685
130) Placement test 3 (webmaster) 310 289
131) Order of adjectives (webmaster) 306 443
132) Could/Couldn't (laure95) 305 676
133) Comparative (anonyme) 304 343
134) Adjectives and prepositions (anonyme) 303 934
135) Agreement Tags (webmaster) 303 912
136) Asking questions (webmaster) 302 960
137) Present perfect OR simple past? (bridg) 298 210
138) Questions in the past tense (anonyme) 297 366
139) Superlative Adjectives (bridg) 295 615
140) Uncountable nouns (webmaster) 295 471
141) Object pronouns (bridg) 294 559
142) Placement test 1 (anonyme) 292 585
143) Present simple (anonyme) 290 760
144) Passive form (anonyme) 290 206
145) Prefer/rather (bridg) 289 179
146) Can/Must/Should (laure95) 288 883
147) Past perfect (lili73) 287 385
148) Must or Have to? (woodyrun) 287 001
149) The/an/nothing (bridg) 285 012
150) To be (anonyme) 283 385
151) Can and can't (laure95) 280 601
152) Vocabulary: asking and answering (here4u) 280 432
153) Modal verbs (bridg) 277 139
154) Some / Any / no... (bridg) 270 275
155) Days of the week (bridg) 269 079
156) So / neither (anonyme) 264 247
157) Past simple (video) (anonyme) 263 562
158) Used to (bridg) 260 300
159) Present continuous (chnawa) 259 478
160) Should / must (anonyme) 259 385
161) Past tense (anonyme) 259 166
162) Vocabulary: on the phone (here4u) 258 713
163) Find out a quantity (webmaster) 258 489
164) Superlative + and adjective (anonyme) 257 052
165) Articles : a / an / the / Ø (anonyme) 256 159
166) Comparative and superlative (anonyme) 254 659
167) Numbers 1/100 (anonyme) 253 486
168) Modal can (video) (anonyme) 252 804
169) Relatives pronouns (who, which, that...) (anonyme) 247 814
170) Comparatives (anonyme) 246 738
171) Vocabulary: at the restaurant (here4u) 245 639
172) A few, a little, few, little (anonyme) 245 056
173) Would rather / would prefer to (anonyme) 244 167
174) Present continuous and the Going to form (anonyme) 242 388
175) Should/ have to/ must (anonyme) 239 697
176) Have something done (anonyme) 239 690
177) The past (webmaster) 237 720
178) Future continuous and future perfect. (felin) 237 473
179) Used to/would (woodyrun) 237 359
180) How to ask a question in English (bridg) 235 155
181) I wish, if only (felin) 233 958
182) Pluperfect (webmaster) 233 731
183) Countable or Uncountable? (webmaster) 233 029
184) Some / any (younes91) 232 309
185) Should / shouldn't (anonyme) 231 248
186) Present simple or continuous (bridg) 230 770
187) Adjectives - ing and ed (felin) 228 704
188) Hypothesis (webmaster) 227 981
189) Auxiliary BE (anonyme) 226 316
190) Articles a/an/the/0 (bridg) 226 135
191) Article The or nothing (anonyme) 225 810
192) Present perfect with Ever - never - (anonyme) 225 373
193) Present continuous OR Present simple? (bridg) 225 270
194) Must or mustn't (laure95) 225 077
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 693
196) To / in order to / so as to / so that (irish21) 219 779
197) Present perfect (bridg) 219 356
198) Comparison (komiks) 217 723
199) What time is it ? (anonyme) 217 569
200) Indirect speech (bridg) 216 245
